Just FYI.... XP 64 -also- uses Server 2003 as its codebase, so you -do- have a choice on 64 bit windows apps at the moment. And since hardware companies are not going to be writing Vista drivers for your old hardware, that is no longer an excuse to use if you want to upgrade to 64 bits. Save your old drivers and learn to dual or multiboot (and all you have to do is take a little care with your system, build it right, and clean out the registry, and you can have a pretty stable system regardless. Hell's bells, my DOS box is running a 3 year old build of 98lite and hasn't BSODed in all that time. My current XP Pro install hasn't BSODed or gotten unstable since the first Nvidia driver update....the one that horked the PCI-E timing. Vista is no guarantee of stability, and with the driver revocation and code level DRM crapola, I would not be surprised that a serious trend of instability emerges once the thing actually gets out into the real world, not the carefully controlled world of corporate and beta testing. And I do know of at least 2 corporate level testers who have been unable to get the bloody thing to even =install=...my bet is firmware issues with the DVD drives they use. They aren't brand new and shiny and don't know what DRM is; they just read data off discs). Tom's Hardware has weighed in with some benchmarks...and the OpenGL performance is abysmal. OpenGL was intended to be a speed up; forcing it to run through DX10 is just M$'s latest attempt to kill off a standard that they do not own. And considering all the games that use OpenGl, and the professional graphics applications, this is simply unacceptable.