The 32-bit versions of Windows just don't cut it anymore, so when making the switch from XP - or Vista - to Windows 7, make sure you choose 64-bit, it's the new craze and it's becoming surprisingly popular. Best of all, most 32-bit applications will run seamlessly on 64-bit operating systems. Here's all the pros and cons of changing to 64-bit Windows.
You probably skipped the Vista bedlam, unless you were one of the unfortunate ones that had it forced upon you while buying a new system. So no doubt you've heard about Windows 7 and you're likely to join the testing phase
and snatch up your copy of the Release Candidate, hell you might've already done so. And why not too, I mean it doesn't expire until June 2010, so you've got a whole year to use it as a test bed. Well, when you do, make sure you get the 64-bit version, and if you've already got the 32-bit version, now's your chance to swap to 64-bit before you get too deep.