dstarr3 is right, and prosumer implies strong compute for relevant app acceleration, but the 750 Ti is a poor choice for this.
Here's what I built for someone for approx. the same cost via eBay (some items were new but sold via normal auction or low BIN, eg. the Intel SSD was only 45 UKP new/unused), a system with remarkably low noise output thanks to the fan choice, etc.:
Antec 300 case (stock fans replaced with top-mounted NDS 140mm PWM + misc others)
Thermaltake Toughpower 850W Modular PSU
i5 2500K (4.7GHz Turbo, or 4.8GHz for 1/2 cores, idles at 2GHz w/ power saving)
Thermalright U120 Extreme RevC + Noctua NF-P12 fan
Gigabyte GA-Z68XP-UD4
GSkill Ares 16GB (2x8) DDR3/1866 CL11
Intel 520 Series 240GB SSD
2x 1TB Hitachi Enterprise SATA
750GB Seagate Enterprise SATA
MSI GTX 580 1.5GB (much stronger for CUDA than a 750 Ti, ideal for AE work)
Sony DVDRW
Akasa Media Card Reader
Windows 7 Pro 64bit OEM
Total: 526 UKP
Things to note: good, reliable SSD for the C-drive, way more RAM (essential for apps like AE), much stronger CUDA gfx card (today a 3GB 580 is even cheaper, two of them are faster than a Titan for AE), reliable SATA, etc.
Just an example of what is possible. Personally, I don't see the point of going for a SkyLake board and then not having an SSD, fitting not much RAM, consumer grade SATA, a GPU with weak compute, a PSU that leaves no room to grow, etc.
Note I also found a refurb HP ZR24W 1920x1200 24" IPS monitor in excellent condfition for 100 UKP total BIN (see item 151649590063), and a new/unused MS kybd/mouse set for 9 total (item 151654526613). Later though, a budget increase did allow me to fit a new 850 EVO 250GB for a dedicated apps cache, something which is very relevant to pro tasks.