Looking to add 1 multi channel amp to go with my new DEX-P1R. Only going to hook up to 2 prs of 5.25"components. Would like something to mount under my passenger seat. Something nice, but reasonable. Lightly used is even okay. I was thinking a Zapco AG650 or maybe a Phoenix Gold 475Ti. Something with very low THD%. Wouldn't mind 5+ channels for option to ever add 1 small sub. Looking for matched components too. Let me know if you have anything, or if you have a good opinion. Car info below