He might be willing.
I dont think its worth it though. Switching to a different OS isnt going to give you better recording quality all of the sudden. lol
I still say to reasearch what is going to work in Vista. Which should be most of it. Specially with all the similiar programs you have. A lot of programs and ahrdware have patches/updates/fixes for vista, and a lot of companies are moving towards vista and dropping xp support.
 
 I wouldnt go for 32gigs of ram, cause thats going to cost a lot. 16 gigs should be fine for all the vsts youll have loaded up. 4gigs works for me, and thats with miroslav loaded. About 5-15 channels, and each channel has anywhere from 1-16 instruments being played/recorded in it. Ezdrummer or BFD, depending on the song, but drum midis can take up lots of ram. But 4gigs so far has been enough to handle it all flawlessly.