"They had macs, so I had to learn."
What's to learn? You can do anything on a Mac that you can do on a PC, without even cracking the instruction manual. Just remember to dismount USB and Firewire drives before unplugging them. Everything else is just intuitive, and works just as you imagine it might. It's kind of like getting into a Honda after a lifetime of Chryslers: you find yourself wondering how you could ever have driven such clunkers.
And, if you must use Windows-based programs, an Intel Mac is still the best, most stable platform on which to run Windows, hands down. But listen to tjm, and skip Vista.