I love XP been on my systems that i built for work and home, but it is showing its age. I have Never put vista into any machine (tried it once along with office 2007) and both where crap.
But on every machine i have put Win 7 on in a work environment it has been faster then XP even on net books and such.
I just hope now Office 2010 is not bloat ware like 2007 was since office 2003 is starting to show its age especially the pst file size limit.
Anyway 2 computers done 16 more licenses to go on this batch. prob about another 50 computers to convert to Win 7 so far so good everyone is loving it, but i do have 1 secret i am teaming SSD's as C drive with Win7.... NOW THAT IS WHAT I CALL FAST.
If you can afford it try a SSD with win 7 = made for each other.