Hi there.
Decided to format and load up Win 7 64bit pro on my 3.2 gig Quad here that has been running XP for some time.
So far here are my thoughts.
Installation was a breeze.
It boots up and shuts down faster.
Imported thousands of emails and my pop accounts from the old XP - Windows Outlook Express to Windows Live Mail no worries.
Desktop looks great over my 3 screens.
All programs that were running on XP that I have installed so far are up and running no problems including CS3 and EDIUS.
Photoshop and illustrator run much faster.
My graphics cards all work fine.
Got a few more things to load up yet buts its looking good.