What about Heatsink for Ocing?
Sycthe Ninja + Artic Silver 5 + 120 MM Delta
also get a 320GB 16MB cache for storage.
What you do is have the raptor as the OS Drive and the 320GB one as storage. You will see an increase in preformence.
The Stacker is huge, everything will fit in there. I would also get that Scepter monitor that was suggested. That is what I have and for a third of the price you will not be disappointed.
As far as whether or not that is a good build, yeah, it will smoke anything you can throw at it for a long time. But you could build a much cheaper rig and still use the quadcore and two 8800GTX's just by getting a different mobo and ram. Between those two things you could probably knock at least $500 off your total price and still have a smokin' rig. And just getting one 500 GB HD instead of the two raptors would save a bunch and you really wouldn't see much of a performance hit.
If you have the money go for it. Those components are awesome. Just suggesting some things to maybe save you some money
Better heatsinks are as follows. (As in, don't buy the one you linked) From Best to worst (Though they all are very good)
Scythe Ninja
XP-120
Xp-90
TT Big Typhoon
Zalman 9700
Any one you choose with artic silver 5 as thermal paste and a 120MM or 90MM Fan.