Groundthumper18,
You seem to know a lot about speakers. I was looking for amps on E-bay and found entry level amps from Kenwood, JBL, Infinity, etc... for around $150. If I bought one of these with about 50-60 watts RMS and 110-125 watts MAX would I be able to get some bass? It does not have to be huge just some clean bass. I am getting some from the factory speakers with the new HU. It is just very dirty.
Could you look these amps and speakers over and give me your opinion?

Thank you very much
amps= JBL GT5-A604, Kenwood KAC-8404, Sony XM-ZR604
speakers= Kicker KS680, Alpine SPS-507, JL C2-570X