Ok guys! You seam to have missed the best fps that was released this year.
Insurgency!
I played cs for years..... Somewhere from beta 0.2 somthing to 1.6 and I never found a good enough for until insurgency, it is a great game. It falls in somewhere between cs and the infantry combat in bf2.
Try it out, I think it is only 15€ on steam.
If you want to try something totally different take a look at theHunter.