I think the general concensus is that anyone who uses Final Cut, pretty much likes it so much that they stop using everything else. I believe this is especially true of editors who are former users of Premiere. Adobe killed Premiere for the Mac after Apple came out with Final Cut because that version of Premiere had been languishing and couldn't compete. Adobe is re-entering the Mac market with their new version of Premiere, so it will be interesting to see if they are serious about competing this time.

The time old myth of Macs being so much more expensive is really tiring! Go do a feature for feature comparison between a Mac Pro and a similarly equipped Dell Xeon workstation and you'll find that many times the Mac Pro is actually far cheaper. And yes, Final Cut will run on the consumer Macs quite well. I run Final Cut on an old 1GHz G4 iMac with only 768M RAM and it does just fine. Final Cut should scream on a new Intel iMac, I'm quite sure, in comparison to my old rig. I've even heard of people here running Final Cut on their Mac Mini's acceptably. I'd love to have a Mac Pro, but I don't have to have one to do nice work. End of rant. Sorry....

But ReverendBeastly is probably right. Do you want to work on windows or a Mac? If you buy a Mac, you can do both...