I am gonna send u one, sexyThis is a very high performance sub, equal to if not slightly bettering the Peerless XXLS.
While there maybe alot of higher output, more rugged designs out there you'll often find that they compromise many of the less important performance details. For the range of output this sub was designed to operate at, I don't think you can really find many better drivers... although at that price I'd balk at paying almost 50% more than an XXLS or a Dayton Ref sub.