I am looking for a reasonably priced(around $200 or less) amp to drive two 6.5" Kenwood Excelon in the front and two Kenwood 6 X 8's in the back. I have a twelve inch sub(Old SVS standard driver) already, so the speakers will only be seeing from about 80hz on up. I am just trying to improve some on the sound quality over the head unit that is pushing them now(Sony CDX MP80, 4 X 52watts). Does anyone know how good Crossfire or db amps are? I have been out of the game for a while and they are both new to me. Thanks!