So my new mac pro is on order and while it will complete my switch over to apple I will still need to have windows for a couple of things. I will need to use Autocad and sketchup mainly but also some games like half-life 2, ffxi online, and maybe anything new that catches my eye. My difficulty is in deciding which OS to go with xp or vista ultimate (and then out of this the 32 or 64 version? -God damn I hate microsoft). I feel a bit like people did when xp first came out, where there were a lot of complaints but in the long run everyone had to get on board. Here I'm unsure as we approach the first full year of vista. People seem to be more willing to wait indefinitely, and microsoft seems slow to put out the fires. Reading reviews I'm not too happy about hearing things like the operating system records whether you've backed up a disc so that you won't be able to make more than one copy of it or that people have had issues with settings changed on them by the os etc. However, my main concern is the outlook for say the next 3-5 years. While I do not wish to have a lot of troubles with installs or programs not working I'd rather have something that I won't need to buy an upgrade for over the next couple of years. Its just unclear to me how long microsoft will continue to support xp in the way of patches, updates, or added features. Input and experiences would be greatly appreciated, thx.