Kicker speakers are very good if you are looking for the thump more than the crystal clear sound as you mentioned, I reccomend getting kicker subs and maybe alpine or cadence 6x9's. I am running on two cadence 4.5 and two cadence six by nines. I have two kicker comp 12in subs in the trunk pushed by a fosgate 1000w amp, and it sounds pretty good. I have the thump along with the clarity of the cadence speakers.