You are paying a lot for the sound card on the mobo. I would get a different one (I have the 680i) and get yourself one of the X-fi cards. Definetely make sure the case will fit as the above poster stated. Other than that, it looks kick ***. Similar to what I have and my rig is a monster..... just wish dx10 games would arrive. I'm not sure you would need the 2nd gtx with that monitor. I have them so I can play at extreme resolutions on a 30" screen. You might be wasting power by having two with that monitor. Dell just came out with a 24 and a 27" you might want to check out. You'll get tons of input on monitors from people here so make sure to check out all the models they mention.
C2 Q6600 @3.6
2- 1GB Crucial Ballistix DDR2 1000(1100 @5-5-5-12 2.2v)
2 EVGA 280GTX in sli
2 WD Raptor 74GB(RAID0)
1 WD Raptor 150GB
X-FI Fatal1ty Edition (Beyerdynamic DT770/80 with PA2v2 amp)
PC P&C 1 Kilowatt PSU
Dell 3007 WFP 30" LCD
LG 18x DVD/CD RW
Silverstone TJ09 (5-120mm Sythe S-Flex fans)-Best case on the planet...
Watercooled. Iwaki MD20RLT>PA120.3(6 fan push/pull)>Apogee GT>2 MCW60's>T-line