The GTS graphic cards, are a thing of the past now. The 8800GTs are the hot cards.
I own the P5N-E SLI, and I can honestly say, it's a great board to work with...and if you want that SLI option. Many on tech forums though, will tell you otherwise, to get a P35 motherboard. Such as the Abit IP35 or Gigabyte P35-DS3R. They're much better overclockers.
Check the Cooler Master 690. In my opinion, a better performing case than the 330.