I have quite a lot of suggestions for you.
I have heard of the case with air conditioning but if it works.... The 975 chipset isn't very good for overclocking really however if you don't overclock I guess it's a fine chipset. Still I would prefer a P5B Deluxe or P5B-E since C2D's overclock so **** safely for a huge performance increase.
The OCZ is an ok power supply but the 12's aren't the stable. There are a lot of ripples in the voltage (4%
which is quite a lot. However there are 4 12 volts with enough amperage combined where this wouldn't matter with a system like yours. I'm just saying there are betetr PSU units out there for the money.
I would buy an X-fi Extremegamer over an older Audigy 2 becuase of EAX 5.0 and it's just an overall better soundcard for not much more.
The E6700 is all right but the E6600 is better for the money really...most people buy an E6600.
The 8800GTX is great and it's EVGA can't go wrong there.
OCZ don't make "bad" ram but G.skill make better for the money. Unless somehow you got a really good deal on the OCZ I would suggest picking up a few sticks of G.skill. The Hk and HZ model are amazingly fast but even their DDR2-800 NQ kit is faster and probably cheaper than those OCZ's.
Get one raptor for load times and OS but run a Seagate 7200.10 as they are more reliable than WD...not to say Wd isn't a good brand.