Boxing day computer build

[firestone855]

So I'm looking for a new setup nothing mind blowing good enough for 1440x900 resolution. I'm trying to build a system for around 600$ yea kinda cheap but at my resolution I'm doubting ill need to spend much more then that.

So at the moment I have a basic setup but would really like some insight

Cpu: AMD Athlon II X4 750K 3.4GHz
Memory: 4gb G-Skills X Series 1866mhz
Mobo: Gigabyte GA-F2A88XM-D3H Micro ATX FM2+
SSD: Sandisk ReadyCache 32GB 2.5" Solid State Disk (Just a boot drive for those yummy fast boots)
HDD: Seagate Barracuda 1TB 3.5" 7200RPM 64MB Cache (Does Cache do anything?)
GPU: 650TI Boost 1gb (Does a Nvidia card work fine with an AMD APU?)
PSU: EVGA 500W 80+ Bronze

Now this setup is about 520$ after rebates (Case/DiscDrive/Casefans are mostly generic)

Any comments? Any suggestions on maybe a whole new build or a part that's cheaper and better? Id love to know also i search with pcpartpicker.

Also I'd like to note I' not pro Intel or AMD just i find AMD is cheaper and runs fine in games as compared to the mid range Intel CPU's.

Anyways thanks tried to make it not so much of a block of text any comments are appreciated.

 

[Quaddro]

Well, this is that i can find for less than $550..

hexacore amd cpu, much faster than fm2 quadcore..and equipped with decent cooling, and you can easily reach 4.2-4.4GHz with this combo..
more memory..
better motherboard am3 based system
bigger ssd..
better harddrive..
faster GPU
and better psu..

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ TigerDirect)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: Asus M5A97 EVO R2.0 ATX AM3+ Motherboard
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory ($68.00 @ Newegg)
Storage: A-Data Premier Pro SP600 64GB 2.5" Solid State Disk ($51.98 @ Newegg)
Storage: Hitachi Deskstar 1TB 3.5" 7200RPM Internal Hard Drive ($60.00 @ Amazon)
Video Card: MSI Radeon HD 7870 GHz Edition 2GB Video Card ($149.99 @ Newegg)
Power Supply: SeaSonic S12II 520W 80+ Bronze Certified ATX Power Supply ($69.98 @ SuperBiiz)
Total: $539.92

 

[lonewolf7]

^ +1, but I would like to replace the HDD for few more bucks, better than Hitachi, more fast with higher density platter for more reliability + 5 years warranty.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Storage: Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive ($88.98 @ SuperBiiz)
Total: $88.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-20 11:08 EST-0500)