Finished this build just a few days ago. Had a lot of help from the all-knowing computer geniuses here on MMO-champ (again: forever thankful for all the help).
Case: NZXT Phantom
Motherboard: MSI P67A-GD65
CPU: Intel i5 2500k @ 4.5GHz (will try to get this up to maybe 4.8 as it's been running stable now at 67c with prime95 for 6 hours)
HDD: 2x 750Gb Sata III 6Gbit/sec (128Mb/sec)
Heatsink: Noctua NH-CP12 SE14
GPU: MSI N560GTX 1Gb ti Twin Frozr II OC Edition (OC:d to 910Mhz on the core)
PSU: Antec High Current Gamer 750W
RAM: Corsair XMS3 4Gb 1600Mhz x2
Got 2x 200mm fans in there, along with 3x 120mm and 1x 140mm (+the fans on the GPU and Heatsink ofc). The built in fan controller in the Phantom helps keeping the sound to a minimum during idle or less-demanding games.
Cable management is near perfect (much thanks to the phantom). A bit messy right behind the PSU and the HDD's, but really no cables interfere with the airflow which keeps the computer really cool, even now during the summer.