Quest on, come to the 64bit side of life. Its easy
Personally the way I go now I don't ever get attached to an install. I keep a lot of stuff backed up so that I can very easily wipe clean and restart on a new slate after just a little bit of work
Its kinda nice to have freedom
Personally I can't wait for Windows 7 to show up on our schools software network share so I can install. Sadly I don't think they will put the 64bit media up as they never did with my vista ultimate (which is supposed to come with both 32 and 64bit cds), as they never do. when i asked for one from software distribution last time the lady just stared at me like i was crazy. So I might need to get the 64bit media, but i can get a key easily
