Just for full disclosure, this is my windows 7 laptop. Next to me is a Debian machine and I run a debian lamp server from home. I also have a macbook at home that I use when I don't need a heavy-duty machine but still would need the basics *nix tools.
Some people like macs and they don't want to spend 83% of their time in bash like we do. That's their freedom. Please lay off.
Hippo, here's what I'd personally recommend. Check the specs and make sure it has the hardware specs required. Especially the video card. This will usually mean a macbook pro. Then do what I do, dual-boot/boot camp it. No emulation overhead or messing with configs.
http://www.apple.com/support/macbook/bootcamp/
As long as the hardware is up to specs to play the game, it'll work.
Oh yeah, get an external drive for the DVD's. Worse comes to worse, if you have a machine with a drive, you can probably write an iso from it and bring it over to the mac.