Well I would have to agree that there's no sense in adding that second amp as it's easy enough to find the very edge of those cerwins with just one.I do like the idea of running 4 big speakers off those two amps, but I would have to say those Polk sda srs look like they should live with me. I will make change for sure. The bass is incredible in those cerwins but mid is lacking , I don't want to service them if they aren't staying. If there is better, louder ,cleaner more true out there with same or better bass, I want them badly lol.