Best Computer for Cheapest Price

I know about a medium knowledge of computers but I don't know enough, and don't have enough time to find out how to build the best computer at the cheapest price. I want a top of the line combination of processors, video cards, etc... that will let me max out any game (Crysis) but, at the same time be about 2000-3000 dollars. I need your expertise on this subject please! Thanks for any suggestion!!!

I also know that if u buy the parts seperately you can save money and I realize now that you aren't going to really go above 2500 if u know what you're doing.