I'm starting to think about what to order for next fiscal year, and I've been happy with Dell, and will probably be ordering Optiplex 745 machines with Core 2 Duo processors. I'm wavering though, on the form factor. I'm tempted to order the small form factor (not the ultra small form factor) to save space, so does anyone have any input on the smaller form factors vs the bigger ones? The components I'd order are exactly the same, so I'm talking from a perspective of heat, noise, dust, and space considerations. To make this email not so narrow focused, I'm also seeking discussion on rolling out Vista on new PCs ordered (I think upgrading older machines is probably not worthwhile). I've been using Vista on a personal machine and I like it, but that doesn't always translate to a good experience in the 'business' setting in which we run.