Idklipsch

ok i am not an audiophile...but i love a nice bass boom with quality sound....klipsch is great...i was going to get promedia 5.1 for my computer....but instead now im goin to get an amp/receiver with a pair of tower speakers and the 12" sub....but what are about the cheapest towers? im lookin for about 400watts to 500 watts a piece....(on the towers) and would two towers with a sub sound good?