What were the top 10 rated PC First Person Shooter games of 2004 /05 /06 /07 /08?

i have always been crazy about FPS's but have been unable to play them cos of hardware requirements which were frankly speaking unaffordable. BUt now that i am the proud owner of an Nvidia GTX 280, i want to play the Top 10 First Person Shooters that were released for the pc every year from the year 2004 to 2008.. Could somebody please tell me what these games are or direct me to some website where i can get this information? i would be mucho obliged..thanks...