If you are of the type that can have set of cabinets made, I would suggest the audio nirvana super 15 alnico drivers. I have a par of those in a set of bass loaded ported cabinets and they sound awesome. I've owned b&w, altec, etc.... and these sound better than any that I have heard including wilson audio.
Just an opinion, but its worth it to check out.
Just an opinion, but its worth it to check out.