If you don't have the experience of building a computer yourself, now's the time to learn. The components have become much more beginner friendly and there are a ton of guides and what not and such on the web (Google of course).
Trust me, it's a skill everyone will eventually want to save a bucket load of cash if you know your PC will be your main source of entertainment. Plus, if you ever need help on something, all of us hardware junkies are here at your beck and call
__________________
Born free, riding free, living free. Always be free.
Q6600 @ 3Ghz, 333x9
Gigabyte DS3R, Rev1.0
Patriot Extreme DDR2 PC-6400RAM
BFG 9800GX2 @ stock