jadesopals,
Results would be best if you begin with the exact task > scale, complexity, and quality of the projects, then define the software that can do it and reverse engineer the hardware from the task and software- the hardware is the last thing to choose.
Software >
Adobe CS or Premiere and Audition for sound and video editing
Cakewalk Sonar X3 Producer for recording /sequncing /multitracking, editing, and effects There are many 3rd party specialty plug-ins for effects and etc.
Hardware >
A multichannel/ multitrack sound USB interface with MIDI. I tend to like MOTU products and these have inputs form all kinds of sources. Again, start with your sources and choose the interface accordingly. Look around on Sweetwater.com and read some recording forums as well.
Decide on whether you will need a MIDI controller/sequencer and/or sampler to create effects, background sounds, etc.
Live recording?
As for a system, this will vary according to the tasks and software. I have a dedicated recording, editing system but as it only for two channel live and MIDI, a fairly low specification works well > HP Elite M9426F Core2 Quad Q6600 2.4GHz, 8GB, 750GB Seagate Barracuda, EMU 0404 24/96 PCI soundcard with MIDI. The graphics card is quite low end as I am only looking at two tracks in a home studio program. Until 2010, I was doing everything on a 1998 Pentium III 750MHz with 768MB RAM and M-Audio 2496 "Audiophile" MIDI soundcard and I made and edited 100's of recordings, live and MIDI, that were surprisingly decent quality.
For your use, as you indicate a professional level, you might consider >
BambiBoom PixelCannon Noisaramicvideographarific iWork TurboSignature Extreme ModelBlast 5000 ®©$$™®£™©™
Processor> Processor: Intel Xeon Six-Core Processor E5-1650 v2 3.5 / 3.9GHz 0GT/s 12MB LGA 2011 CPU, OEM > $600 (Superbiiz )
____http://www.superbiiz.com/detail.php?p=E5-1650&c=fr&pid=2c44208f0b1dcd0cde99479f720367c6945473d18f8a0933a1a8bcd4ed5ec4f2&gclid=CKerxcX37bgCFY2Z4Aod2TEAzQ
____http://ark.intel.com/products/75780/Intel-Xeon-Processor-E5-1650-v2-12M-Cache-3_50-GHz
Cooling> Noctua NH-U12S 120x120x25 ( NF-F12 PWM) SSO2-Bearing ( Self-stabilizing oil-pressure bearing ) CPU Cooler $70
____http://www.newegg.com/Product/Product.aspx?Item=N82E16835608040&Tpk=Noctua%20NH-U12S
Motherboard> ASUS Z9PA-U8 ATX Server Motherboard, C602 chipset, LGA 2011 > $289.99
____http://www.newegg.com/Product/Product.aspx?Item=N82E16813131915&Tpk=ASUS%20Z9PA-U8
RAM> 32GB ( 2 X 16GB) SAMSUNG 16GB 240-Pin DDR3 SDRAM ECC Registered DDR3 1600 Server Memory Model M393B2G70BH0-CK008 $380 > ($190 ea.)
____ http://www.newegg.com/Product/Product.aspx?Item=N82E168...
GPU> NVIDIA / HP Quadro K4000 3GB GDDR5 PCI Express 2.0 x16 Workstation Video Card > $754
____ http://www.amazon.com/HP-Quadro-K4000-Graphic-Card/dp/B...
GPU Options > GTX 580 (3GB), Quadro FX5800 (4GB), Quadro 6000 (6GB)
Hard Drive 1> SAMSUNG 840 Pro Series MZ-7PD512BW 2.5" 512GB SATA III MLC Internal Solid State Drive (SSD) > $470. (OS , Applications, Working Files)
____ http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Hard Drive 2> Western Digital 2 TB SATA III 7200 RPM 64 MB Cache Bulk/OEM Desktop Hard Drive, Black, WD2003FZEX(RAID 1) > $168 (Files, Backup, System Image)
Hard Drive 3 > Western Digital 2 TB SATA III 7200 RPM 64 MB Cache Bulk/OEM Desktop Hard Drive, Black, WD2003FZEX (RAID 1) > $168 (Files, Backup, System Image)
____http://www.amazon.com/Western-Digital-Cache-Desktop-WD2003FZEX/dp/B00FJRS628/ref=sr_1_1?s=electronics&ie=UTF8&qid=1382357499&sr=1-1&keywords=Western+Digital+2TB+SATA+III+7200+RPM+64+MB+Cache+Bulk%2FOEM+Desktop+Hard+Drive%2C+Black%2C+WD2003FZEX.
Case> Corsair Obsidian Series 900D CC-9011022-WW Black Aluminum ATX Super Tower Computer Case $349.99
____http://www.newegg.com/Product/Product.aspx?Item=N82E16811139019&Tpk=Corsair%20Obsidian%20Series%20900D..
Power Supply > SeaSonic G-750 SSR-750RM 750W ATX12V / EPS12V 80 PLUS GOLD Certified Modular Active PFC Power Supply $110.
____http://www.newegg.com/Product/Product.aspx?Item=N82E16817151132&Tpk=SeaSonic%20G-750
DVD Burner> ASUS Black 16X BD-R 2X BD-RE 16X DVD+R 5X DVD-RAM 12X BD-ROM SATA Blu-ray Burner BW-16D1HT > $109.99
____
http://www.newegg.com/Product/Product.aspx?Item=N82E16827135306
_________________________________________________________________
TOTAL = $3,470.
Again, this is a bit generic. The graphics card in particular can have a lot of variation according to the sofware, but I would tend to stay with CUDA and because of the large file sizes and to have 10-bit color precision I gravitate towards Quadros with a lot of memory.
Monitor(s) >
Monitors are very important. For images and sound, a large, 2560 X 1440 monitor is useful as there can be many tiny waveforms hundreds controls and dozens of controls and a matching or smaller monitor is helpful. If I were doing what you're intending, I'd have a pair of these >
ASUS PA279Q Black 27" 6ms WQHD HDMI Widescreen LED Backlight True Color Professional Monitor 350 cd/m2 100000000:1 Built-in Speakers height&pivot adjustable > $800
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236343
The other important feature is to have good sound monitoring. I always use closed headphones for this, in my case modestly priced ($100) Sennheiser HD280 Pro, but for your use, you may want a headphone amplifier (depending on the interface) and the higher end professional headphones are open >
Sennheiser HD 650 Audiophile & Reference Headphones - Open > $500
http://www.sweetwater.com/store/detail/HD650/
OK- that's a start,..
Cheers,
BambiBoom
HP z420 (2014) > Xeon E5-1620 quad core @ 3.6 / 3.8GHz > 24GB ECC 1600 RAM > Quadro 4000 (2GB)> Samsung 840 SSD 250GB /Western Digital WD1003FZEX 1TB> M-Audio 192 sound card > AE3000 USB WiFi > HP 2711X, 27" 1920 X 1080 > Windows 7 Ultimate 64 > Autodesk Building Design Suite, Inventor Pro, Solidworks, Adobe CS MC, Corel Technical Design Sketchup Pro, WordP Office, MS Office Pro [Passmark system rating = 3815, 2D= 767 / 3D=2044]
Dell Precision T5400 (2008) > 2X Xeon X5460 quad core @3.16GHz > 16GB ECC 667> Quadro FX 4800 (1.5GB) > WD RE4 500GB / Seagate Barracuda 500GB > M-Audio 2496 Sound Card / Linksys 600N WiFi > Windows 7 Ultimate 64-bit > (earlier versions) AutoCad, Revit, Solidworks, Sketchup Pro, Corel Technical Designer, Adobe CS MC, WordP Office, MS Office Pro [Passmark system rating = 1859, 2D= 512 / 3D=1097]
HP Elite M9426F (2008) > Core 2 Quad Q6600 2.4GHz > 8 GB DDR2 1066 > ATI Radeon 4650 > Seagate 750GB > EMU 0404 PCI Soundcard / MIDI. Sennheiser HD 280 Pro, Marantz 2275 with Yamaha SR-2135 monitors / Windows 7 Ultimate 64> Cakewalk Home Studio 2 XL, Hauptwerk Virtual Organ, Garritan virtual Steinway D> sound Recording / editing