I'm in the same boat... I'm about a month off (or so) from buying a license for Win. 7. I beta tested and tried the release candidate. I must say it's much better than Vista and I'm impressed with it overall.
However, I'm procrastinating making the switch to Windows 7. Not because it's a bad O.S., but because I've had the past 10 years to master XP, and as a result I've become extremely efficient on XP with ZERO unexplainable quirks.
Kinda like building an car engine... you know the thing inside and out... but if you buy a new car... you might ask "What's that noise.... is that supposed to sound like that?" You can figure it out, but it takes some investigation.