I got Vista Ultimate 64-bit on a new laptop the first week it was released. On the plus side I've found it more stable than XP. It also has a lot of nice new features. For example, if a program crashes, Vista automatically tries to fix it. If it can't, it often will give a direct link to new drivers, etc. on a 3rd party site. I have XP on another computer and it now drives me crazy. However, much as I like Vista, I'd never try to upgrade it on an XP computer. Getting it on a new computer avoids most of the problems folks are seeing with Vista. On the minus side I'm not sure I'd get the 64-bit version of Vista again. In fact I've just gotten a new desktop with Vista and made sure it was 32-bit. Support for 64-bit has been very slow, which isn't the case with the 32-bit version. I've written a number of places asking for 64-bit support for programs and add-ons, but usually hear back that it's not worth the time and effort for them to provide something that has so few 64-bit users. That's even true for the Microsoft fingerprint reader! For me the extra security of 64-bit has been wiped out by the lack of 3rd party support for it. On the SP1 issue. I'd read that MS never intended to have SPs for Vista, as they were automatcially updating users computers as they went along.(No more manual updating in Vista.) Thus, there'd be no reason for a SP. Well, so many folks were waiting for the mythical SP1 to go to Vista, that MS decided to make one out of the updates to boost sales. As far as Vue, 64-bit has been a bit of a mixed bag. Vue is one of the few programs that has a special 64-bit version. For the most part it takes advantage of 64-bit, but I've found odd quirks evidently not present in the 32-bit version. Tech support has jumped on all my bug reports, so they do fix them fairly quickly. My only current problem is Vue crashing when trying to import some (but not all) .obj files.