The next build is about 100 over initial budget but is pretty damn peak for about half a G. Latest technologies with plenty of graphical power.
Intel Core i3 - 530
GSkill (2x1) PC3-12800
HIS HD5670 IceQ
<--- Has a better cooler, reputable name, and GDDR5.
SeaGate Barracuda 7200.12 320GB/16MB
<--- The 500GB/16MB is in stock at 54.99 That's a lot more for 5 dollars if you feel you need it. They both have free shipping right now.
CoolerMaster eXtreme RS-460
CoolerMaster Elite 330 Mid-ATX
The Core i3 has an Integrated Graphics Processor (IGP) That is about the equivalent to a GeForce 9300-to-9400GT. It benches in between the two. It does not support DX11 AFAIK
, but has pretty intense power and would shave 100 dollars off of the build putting it back into the tolerable budget. From what I understand, it uses the CPU a little for graphics processing and taps into the Physical RAM for use as VRAM, which is a bit inefficient, but it's nice.
I'd also like to note that, though the Gigabyte H55M has two PCI-E slots, you CAN NOT SLI or CFx on the board. Neither the H55 or H57 chipset can support multi GPU setups. They have a limitation in the available lanes for PCI-E (20x) [16x] and [4x in the 16x format]. The actual x16 is a 2.0.