System is almost 2.5 years old, I set it up last OS reinstall with 3 partitions.
Formated E drive, and installed Win 7 ultimate in something like 45 min.
Another 45 min to an hour to install stuff like Firefox, glary utilities (take control of the start menu)
Threatfire, etc.
Setup as dual boot so I can still fly and do my usual stuff in XP pro, but when I have time and interest I can drive in Win 7 and learn how to tame it.
Doing an upgrade without cleaning out the old garbage is just asking for trouble IMO.
Ohhh and yes I still have a partition free if I want to try linux again. Which I like to do every couple years.
One of these times they'll have enough of it put together that I can make the switch.