Re: **NEW PC & CASE**
Any particular reason you didn't choose to go with the Gen2 I7-2600k and Socket 1155?
It's slightly more expensive than the I7-870, but it has better performance at the stock clocks. The 2600k is also easy to overclock above 4GHz. (Get a third-party heatsink and fan.)
I don't know how well the onboard graphics of a Z68 board would compare with a GT220, but they might be all you'd need.
As for cases, have you considered the Antec 300? (I don't own one.)
Intel I7-3930k, Asus P9X79 Pro, nVidia GTX680, Asus PA246Q monitor, 4 X 4 GB g.skill DDR3-2133, Creative X-Fi Titanium, Corsair Force GT 120GB SSD, WD Caviar Black 1.5TB, Win7 X64 Pro