Trying to decide between these two subs. Price difference of about $200 bucks. I understand the XXX12D2 will obviously get louder etc., but is it just overkill. I like all types of music, but I want something that isn't just going to be sloppy and loud. I would like something that has some clean sound all the while still having the loudness. I know its asking for the perfect speaker. What kind of amp is going to be required for the XXX? I was thinking of the ED Nine.1 for the MX12D1. Would that fly for the XXX, or is that beast going to be two of those amps?