I've observed this thread and figured I'd jump in. My business was a dyed in the wool Microsoft world for 12 years. We have 16 workstations. Last year, our people kept saying, we gotta get macs, we're spending too much time with problems (everything was up to date on ours at the time). We relented and got a couple of macs to try. Desktop and a 15" Mac book pro. After a few weeks our people were screaming to get macs for themselves. We did and too a person everyone prefers Macs, whether it is accounting, development, WP, whatever. There simple and TROUBLE FREE.
I couldn't believe how much less issues we endured and can't believe we waited this long.
I'm now a dyed in the wool Mac user.