Thanks for the quick replies
One potential gotcha is support for 64-bit applications and peripherals - I'm not a gamer so I've got no idea how likely it is but you might want to make sure that your fave games will run on a 64-bit OS and that 64-bit drivers are available for any special gizmos you play with. I think that as a rule of thumb Vista 64-bit drivers will work with Win 7 but I stand to be corrected on that.
Thanks for that, I'll have a look into it
I had a google but couldn't find anything, but am I right in thinking my Windows Vista product key (that is on a sticker on the side of the PC) will work with the Windows 7 CD?