Which version of windows should I install via BootCamp

[FCzenit]

I just bought the high end macbook pro 13" (2.53 GHz) today and I have a question about which version of windows to install on the boot camp partition. I saw a couple of videos on youtube showing pretty smooth performance of GTA IV on a MacBook Alu 13" 2.4 ghz model using BootCamp Windows Vista SP1. I dont want to install Windows Vista SP1 just because of that video and I want to know which version could give me even better performance. Both official and unofficial windows versions of XP, 7 and vista are under consideration. I dont need windows for anything else, just for playing a couple of games. OSX takes care of the rest

 

[rgarjr]

Get Windows 7 RC

 

[FCzenit]

32 or 64 bit?

 

[jeevesofRKdia]

64-bit.

Works fastest, but the drivers are a little more painful to work with.
Plus, with Win 7, you get the help of better management to get your games working well.

 

[FCzenit]

Anymore suggestions before I start downloading Win 7 RC?