Your looking for sound quality and people are pointing you in the complete wrong direction.
For starters all the new RE stuff is sloppy to say the least. The old RE stuff was SQL stuff at best.
When I hear sound quality I think of brands like Boston Acoustics, JL, Focal, and Dayton.
Now to the actual point. You can make just about any sub sound good or be loud with the right box. I've seen Walmart subs stomp on $300-$400 subs in a better designed and build box.
Your best bet is to pick a sub that you like and do a custom setup in it. You don't need a ungodly amount of power most SQ systems I've seen have 1000 watts or less to the sub(s).
