I'm currently running a Rockford p5002 amp bridged to a Alpine Type R 12. So far, the cleanest sub I've ever heard was the JL W6v2, but those were 10's. My question is, what 12" sub sounds better than the JL's in anyone's opinion? The whole group buy deal with the RE SX's really got me thinkin. And my Alpine bumps pretty clean, but I think I could do better when I get the spare change. I was planning to use the same box and same amp. Thoughts?