What are some good game enhancers out there for first person shooter games?

Im looking for a good game enhancer, it cant be to expensive but it has to be effective, im talking about stuff like the kill dot and FPS freek.

And any one who has those, im just wondering if they really work

thank youWhat are some good game enhancers out there for first person shooter games?well if you have ps3 i reccomend you get the "Real triggers" from gamestop they keep your fingers from slipping off when your throwing grenades or shooting in some other games