I'd get the 500R case and the HX850
I'd get the 2500k for a gaming rig or the 2700k if HT is needed for applications. The 2600k really has lost its niche just $40 less than the 2700k
Corsair Vengeance is available in both low profile versions as well as the silly ones with the tall heat sinks. The low profile versions won't interfere w/ anything
http://www.newegg.com/Product/Productcompare.aspx?Submit=ENE&N=100007611&IsNodeId=1&bop=And&ActiveSearchResult=True&CompareItemList=147|20-233-196^20-233-196-TS%2C20-233-186^20-233-186-TS%2C20-233-199^20-233-199-TS
64 GB is too small ....you'll be clamoring for space in 6 months time unless you are an astute windows user. But a 120 / 128 GB Tier 3 SSD from the list here:
http://www.tomshardware.com/reviews/ssd-review-benchmark,3115-6.html
Move up from the 212 to the Hyper 612 PWM and get an extra 5-7C of cooling..... Scythe Mugen 3 will do as well.
GFX ..... the 6970 isn't very attractive at $320 and gets ya 526 fps in Guru3D test suite or 61 cents per frame.....look at some other choices.
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 @ 1920 x 1200) 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:
$ 155.00 6850 (371/634) $ 0.42 - $ 0.49
$ 160.00 6870 (434/701) $ 0.37 - $ 0.46
$ 220.00 6950 (479/751) $ 0.46 - $ 0.59
$ 240.00 6950 Frozr OC (484/759) $ 0.50 - $ 0.63
$ 205.00 560 Ti (455/792) $ 0.45 - $ 0.52
$ 320.00 6970 (526/825) $ 0.61 - $ 0.78
$ 205.00 560 Ti - 900 Mhz (495/862) $ 0.41 - $ 0.48
$ 340.00 570 (524/873) $ 0.65 - $ 0.78
$ 500.00 580 (616/953) $ 0.81 - $ 1.05
$ 725.00 6990 (762/903) $ 0.95 - $ 1.61
$ 750.00 590 (881/982) $ 0.85 - $ 1.53
$ 450.00 7950 (603/NG*) $ 0.75 - ERR
$ 550.00 7970 (675/NG*) $ 0.81 - ERR
Could not complete test suite, expected to be resolved w/ future driver releases.
I find the 6870 attractive at 434 fps costing me 37 cents per frame in a single card config and 701 fps 46 cents per frame in CFI. Next up is the 900 Mhz 560 at 495 fps costing me 41 cents per frame in a single card config and 862 fps 48 cents per frame in SLI.
At 75 cents per frame and up, I just can't see the 580, 7950 and 7970 as using two of the 6870's or 560's above kicks their tails for a lot less money.