yeah, but ure paying up to 25000€ for a mac pro like that ;-)
back to topic, as said above, if you dont need your computer ONLY for games, go for a mac. I wasnt sure for about half a year and I bought my macbook pro 4 days ago, and Im sooo happy with it!!! I got a good pc at home, and I havent started it for the last 4 days...
oh, yeah, you can customize your pc far better than your mac, but, you dont have to customize your mac. everything is right in place...