Maybe i have something to contribute because I am a VERY recent Mac convert, myself. I just bought my first Mac last month, so I've had it for 2 weeks. I've been a PC user--and builder--for 10+ years.
I bought an iMac, and I couldn't be happier. The thing is powerful, but not confusing. This may sound strange, but it feels like it "flows", whereas my work on a PC was always clunky (click, wait, crash, update, patch, tinker, patch again, defrag, uninstall, track down driver, crash, and fix the registry). ALL my Windows stuff works on my Mac (using VMWare Fusion 2.0), with no hassles at all.
I do have some minor gripes about Macs, just because of things I've gotten used to. For example, only being able to copy/paste, and not cut/paste, with right-clicks. and Mac can be fussy about which of all my stored videos it will and won't play (my kids can't watch Charlie Brown Christmas now, because it's not in a quicktime-approved codec form). Minor issue, though; I simply found another free player (or I could have used Quicktime Pro to convert the file itself).
Oh, and I bought mine refurbished. It has ALL NEW components, installed into a used system, without a mark anywhere. It's mint condition, and $200-300 less than new.