I won't try and persuade anyone here, but since it was asked i'll give my 2 cents. If you play a lot of PC games, don't get a mini for your gaming machine. You could get a Mac Pro and get a better video card and then dual boot with vista. Here's the things to consider in my opinion.
-Price, obviously - I think macs a good deal for what you get, don't let people throw numbers at you, like it was stated before, Mac OS runs on less then windows.
-Customer Service - Apple Support is second to none, if you get a mini or anything else spend the extra $200 and get the 3 year warranty. I sent my macbook in for a problem with the screen and they airmailed me a box with tape and padding and a return label and I got it back fixed in 3 days, they also noticed problems that I didn't think were a big deal and replaced them for free.
I would recommend a MacBook, they just got upgraded processors and RAM for the same price, + built in 802.11g, you could get an adapter to hook it up to a monitor for 20 bucks and they may be only 13" but they are VERY portable and if you ever want to bring it to school it makes things easier.