i've only used the falkens so i would vote for them (but the polling function isn't working). but the kumhos are also very comparable from what i've read. they're both priced well and provide excellent treadwear. the kumho is more of a summer tire where the falken can be used year-round (if you don't drive through a lot of snow).
the pirelli and toyo are both expensive.
go to tirerack.com and read the reviews for all these tires (except for the falken). their server is not responding right now, so check it later today.