First off I do NOT suggest Vista for a gamer as most games don't even play right with it. Some games don't even load up...
I agree to go with G.skill HZ's as they will hit DDR2-1000 at Cas 4
Go with a cheaper motherboard as SLI is stupid...such as a P5B-E, a DS3, or even the MSI P6N 650i as stated.
That case is EXPENSIVE! There are plenty of other cases that cool just as well and are similar for about 70-80 bucks less.
Look at the Gigabyte Aurora, A Thermaltake Armor, or a CM Stacker.
The Zalman 9700 looks good and works well enough but there are still better coolers out there for the price; such as the Tuniq Tower 120. The Thermalright 120 Plus. Or the best of the best I think the Gemini II