Not familiar with the CVX's. It's been a while since I needed to but subs. As far as amps go Kenwood(for amps anyway wouldn't be in my top 3, but they're pretty good) is fine. It doesn't matter so much what amp you get so long as it is clean and rated at its true wattage. I've always bought Rockford amps-never disappointed me and there is no truer rating than what is stated on them.