I think there's a lot of misconceptions out there regarding Macs.
1) While we are not immune to viruses, I have yet to have one, nor have any of the mac users I have encountered - which is a heckofalot. I have to do zero maintenance on my machine, no spyware scans, no adware scans, no virus scans, no defragmenting my hard drive, nothing. I can just use my computer. Something I never had during 19 years of Windows usage.
2) I'm not sure where the "$1000+ more" comes from. I did my market research before buying a mac, and to get a similarly sized Windows machine with the same specs as my MacBook would've cost me $200 more for a decent quality machine. True - Mac doesn't sell a low-end laptop or desktop, but my logic on the issue is this: For a fog machine, do you buy the crappiest dollar store fog-juice you can find? Or do you go out and spend the extra money and get the fog-juice that will actually work, even if it's double the cost? You *can* buy good Windows machines - I custom built them for years, and am planning on building my next desktop to run Windows XP on. It will cost roughly the same as a 24" iMac and probably outperform it slightly.
3) We are almost completely compatible with all file formats, we just have some issues with certain apps. However, there are cheap or free alternatives to almost every Windows app that doesn't exist on a Mac.
All that having been said... I'm really sick of the whole angsty windows vs. mac arguments. Lets have friendly debates, but it's not a huge deal really... both have their uses, both have their positives and negatives, and both are impressive in their own right.