Which is the best combat simulator for pc?

I only know lock on, falcon 4 and microsoft combat flight simulator. I think that falcon 4 allied force is the best. Is there any better combat flight simulator game for pc.

Pd: I dont want world war 2 combat flight simulators as il 2 or battlestation midway.Which is the best combat simulator for pc?
batlefield 2 is coming and that will be the one