I think Vista looks great. My friend already using that (Vista Home Edition) But as for me, I'm not fully convince about the capabilities of Vista. Its not that is isn't good, since I still have some old softwares that could only at least run at XP, so tha's why I'm not yet giving up to my XP...

But since you're PC has a great specs, I think its not bad to try Vista. But make sure all of your programs can run through Vista...