I'm trying to figure out whether I need to go with the 64-bit version of Windows 7. I'd rather not, unless there's a big benefit, because even one or two missing 64-bit drivers or one app that doesn't work quite right wold be a lot of work.
The biggest reason to go with the 64-bit Windows 7 that I can see, is that it allows the use of more RAM. But I never max out my RAM now (despite simultaneously burning CDs, testing software in Virtual PC, with Windows 7, no less, and editing a document in Microsoft Word).
Since Windows 7 has a minimum RAM of 1 GB, (compared to something like 64 MB for XP) that suggests that Windows 7 uses a lot more RAM. So, how much more RAM does Windows 7 use than Windows XP?