I say no way.
I used vista on an HP TX1120 for part of a week and really couldn’t wait to get back to XP.
XP is faster.
XP is more stable.
XP doesn’t assume that you’re an idiot. UAC anyone?
XP supports more devices in use today.
I’m waiting for SP1 before I try Vista again.
The only feature in Vista I would like to have today are the TIP improvements. The cost of the rest of Vista isn’t worth it.