TheEspionage, I agree your processor will work fine with Vista.
I think you should upgrade your RAM as well. To be quite honest I find XP and OSX barely acceptable on 1gb of RAM, Vista isn't much different. The big difference between XP and Vista is that Vista is able to use more RAM more effectively. Two or three gb in XP is nice, but in Vista it's nicer.
In my experience so far Vista seems to possibly handle multi-core processors better as well.
As far as nVidias driver support, I haven't tried a new version in a while. Even with the drivers included in Vista you can still game and everything works. I have to look in to the changes to see what has been improved, the biggest annoyance to me was that the drivers used to not throttle the GPU fan down when it wasn't needed. I don't know if that's been fixed but I have an aftermarket cooler now and hardly care. (I have a 7950GT, I'm not really a gamer but I have played C&C3 on Vista 64 and it ran perfectly).
Like Stilgar said, people are freaking out about Vista and many of them have no real experience with it. IMO it's probably my favorite between XP and OSX right now, but it's not perfect which is to be expected. Even with Vista 64 and the few driver issues I've had, it's been a good experience.
Mistah, I was looking in to Creative a bit yesterday. The biggest problem I have is that the ADI SoundMax drivers are abysmal and on Asus P5B boards when installed they introduce static and noise, so I'm just using onboard sound without any drivers. It looks like creative does now have Vista 32 and 64 drivers but I'm not 100% sure. I might get one of their cards if they had straightforward hearders for front panel sound connections.