Mac X PC = Religion X Science
Anyway, if you get an Intel Mac or PC you can install Windows XP and MacOSX to see what you like most, but you gotta check if your hardware can deal with it before. I´m using Vista here and it´s the best OS that I ever used (Vista and OpenBSD).
Vista is crap. A downgrade from XP. Give me a break. This renders everything else you say false, as well.
I have Mac OS X (running on Macs), Linux, and Windows (XP and Vista) in my house, and I know each OS inside and out. I prefer Mac OS X to everything else and I also prefer Mac hardware, because it is better in hundreds of ways than anything else out there.
It's not fanaticism; if the Mac had a crap OS like Vista or XP, I would be running Linux. Thankfully, Apple has come up with by far the best OS out there, and the best hardware integration. It's not a religion to me like it is for some dipshits out there, and I don't agree with every decision Steve Jobs makes. For example, I think the iPhone is a potentially great product but is ruined by its forced tie-in with AT&T and some of the insane business policies surroudning it (not accepting CASH as a form of payment for buying an iPhone is the tip of the iceberg.) I also think Apple needs to come out with a budget tower machine. But I digress...
You don't have to spend a ton of money to get a Mac, and when you buy a Mac your investment lasts longer, and if you need to sell your Mac on eBay after a few years you will get a lot more for it than with a PC. I've built PCs (in fact I still do for friends) and that can be a rewarding hobby, but ultimately nothing touches what Apple is doing. The integration and longevity of an Apple machine are worth paying a slightly higher price tag.
If you really want to go the budget route, though, I think there are two clear choices. Either get a late-model used Mac, or build a Linux box out of spare parts. I can't understand why anyone who has any technological awareness or anyone who cares about saving money would run Windows.