[Churst]

You can't say that drivers are not "mature" as you put it. Vista 64 has been out for in excess of 2 years and drivers for everything that I own have been updated 10's of times over that period and have become hugely reliable. My system just DOES NOT CRASH.

I fix computers and diagnose computing problems for everyone I know. People running XP very rarely have any problems these days. The only people who I've seen in practice having problems with Windows Vista, and it's reliability, seem to be those running 32bit.

The thing is that Microsoft see the 64 bit version of Vista as being very important to the future of modern computing. So it seems natural that they focus their attention on that.

I also spend a lot of time on another forum (not sure if I'm allowed to link it) for the PC obsessed. I have spent many hours reading about those peoples experiences with both systems and 64 bit always comes out on top.

Plus why would you limit your system memory to 3.7GB?

P.S. (the more ranty, less relevant bit)
It seems to me that among the music fraternity there is just general hostility towards the apparently "scary" move to 64 bit. I read a piece in Sound on Sound, not all that long ago, that claimed that 64 bit computing has little or no benefit to audio production on computers. That shocked me somewhat, being as every single other computer based industry on the planet is embracing the phenomenal power enhancements that 64 bit computing will bring.