Building a micro gaming computer; would this work?

[Jordan]

im choosing a mini because ill be moving around a lot in the near future.
The specs would be...

Processor: Intel Core i7 920
Motherboard: EVGA X58 SLI Micro
Memory: Mushkin Blackline 4GB (2x2GB) DDR3 1600MHz CL7 (DIMM)
Hard Drive: *i have this* some Hitachi 7200 rpm SATA interface
Case: NZXT Vulcan Black mATX Gaming Case
Video Card: EVGA GeForce GTX 460
PSU: Corsair HX650

also debating on what version of Windows 7 i should get

my budget is at around $1200
if you see any flaws or can make any improvements; please

also the game im most looking forward to is D3 and i was wondering how well it would run on this machine.

plz help and thanks you =P