Hey all, I'm looking into getting a Mac Pro in the near future. I have some questions about it: 1. If I choose to get the single processor (quad-core), is it possible for me to upgrade it later with another quad-core-processor? Would Apple perform the upgrade for me later on? 2. I plan on using VMWare Fusion to run at least 2 copies of Windows XP at any one time. Obviously, the more memory the better. Has anyone tried running multiple virtual machines (2 x XP + 1 x Linux) at the same time on a single-processor with, say, 4 GB of memory? I plan to gradually bump the memory as the need goes... 3. This question is purely subjective, but just wanted to get an idea anyway: does the Mac Pro make a lot of noise in general? My current desktop gets rather loud, and I sometimes get annoyed when I don't have any music playing in the background to drown it out. Thanks in advance!