This^ and PC's are more up gradable and future proof. Unless you count on the Thunderbolt being in the future, which most don't. You can't add a second video card in the future for an iMac if you want to improve your video editing hardware down the road in a few years.
Im pretty surprised on how many people dont like macs. Shinoda seems to enjoy Macs. Then again, look what the band and him do with them. So far, I love my Mac.
ZOMFG! MIKE USES MACZ? OMFG! IMMA SO GET 1 NOAW! I've always been a Windows user, XP and 7 have been fantastic and I am interested in Macs but haven't really explored the platform that much (but I plan to do so).
I use both and I prefer mac's interface when I'm doing graphic design work, it's just a lot easier to multi-task with multiple windows/programs open at the same time IMO. When I play games I use windows installed on my mac only because games are programmed to run on windows way more efficiently than on OSX. I wouldn't get a Mac if you're just going to use it to browse the internet, you can get a much cheaper equivalent/better spec PC It's all personal preference really, I love apple haters that have never even tried OSX though, it's like talking shit about a video game you've never even played. Fuck itunes though, winamp all the way.
MI just switched from Windows to a Macbook Pro and I do love the apple computer. It is very well built and its OS is great.