HAF-932 is outdated (No front USB 3 ports for example). The HAF-X is a fine case, to my mind only exceeded by the DF-85. I have built 6 boxes w/ the DF-85 (one w/ HAF-X) and the case grows on me more each time. best thing about it is the fact that it fits the CPX form factor PSU's which jonnyguru writes about the CP-850:
It is completely unmatched by any ATX unit on the market I can think of. You'd have to spend twice as much as this thing costs to find the next best thing, performance wise.
Scythe Mugen 2 is more than you need for Sandy Bridge....there are better coolers but putting them on SB CPU's won't get ya better OC's. It outdoes the Hyper 212 by 7C so the extra $10 is well worth it. Shin Etsu matches AS5's thermal properties but w/o the problematic 200 hours curing time that AS5 requires. The 560 (factory OC'd to 900MHz) comes very close to matching the 570.
Guru3D uses the following games in their test suite, COD-MW, Bad Company 2, Dirt 2, Far Cry 2, Metro 2033, Dawn of Discovery, Crysis Warhead. Total fps (summing fps in each game) for the various options in parenthesis (single card / SL or CF) are tabulated below along with their cost in dollars per frame single card - CF or SLI:
This build is set up so that you can add another one of those gtx 560's later on for SLI. Also that Samsung h/d down below is quicker and quieter than that WD. The case down below isn't a full tower, but then again your on a budget. The monitor is a full HD 1080 LED Back Light with 2ms response time.