I highly highly recommend Battlefield 2: Modern Combat. This is an awesome game. I have it for the xbox. Also the Call of Duty games are awesome. Another favorite of mine is Splinter Cell. The actually just came out with a new one called Spinter Cell: Double Agent. If you wanna check out some more options other than these check this page out.
http://www.gamefly.com/products/sear...25&showall.y=3