I have vista 64-bit on 3 pc's now......and they all run outstandingly. Frankly I am getting really tired of hearing everyone bitch and moan about how bad vista runs. It works great, as long as you get SP1. One machine is a gaming machine, and frame rates have never been a problem. Another is a HTPC, and it has never given me a problem. Third is my laptop which does everything, games, movies, web, and it has also never had a problem. The only machine I have ever had blue screens on is the gaming one, and those were ALL overclocking related.
Frankly, I prefer vista EASILY as it is much easier to navigate around in, things are laid out better, it looks better, and anything can run it.
YES - ANYTHING. I had a 4 year old sony, pentium 4 3.4 GHz, 2 GB ddr2-400 ram, geforce 6600 graphics, and it runs vista (32 bit since the P4) like a dream. It was JUST as fast as XP was on identical hardware. By the time SP1 was out, which was a while ago now, I have not had a single issue with drivers or software. So the only excuse to bitch about Vista at this point is to be a fanboy, and if thats all you are, shut up, we dont care.