Ken can put me out of a job. I take a day to play video games, and he gives all the right answers.
And I'll reinforce that the 64-bit version of Windows is the way to go. I've run every version of 64-bit Windows from XP X64, through Vista, to 7 (I actually had Windows NT 3.51 and 4 running on a DEC Alpha 64-bit RISC processor, but that's another story). They've gone from horrible, to passable, to works fine. Now that Windows Server 2008 R2 is available only as a 64-bit version, MS has forced everyone to be compatible with 64-bit.
The only time I'd use the 32-bit version is if you're running it inside a virtualized environment (trust me, you're not), with 64-bit you're not going to be limited in RAM upgrades down the road, and you can run 64-bit versions of programs, which sometimes are faster.
