In those sizes, you will find that there are about as many styles, brands and models as there are opinions.
John B is right, you really ought to load up some of your favorite music and a phone book and go find some shops where you can listen to some of your stuff on the speakers you are considering. It might take a little time, but with patience, you will figure out the best setup for your listening needs and desires.
I could recommend you buy Kicker, (I work there) but I would hope you would not go buy them blindly just based on my recommendation, (well, okay, maybe I would hope that...
) Shop around and buy what sounds good to you.