Best speakers for classic rock

Speakers can excel more at one genre than another because of different requirements in volume and bass.  This becomes blindingly obvious when you take it to an extreme.  Say a speaker needs to be able to do 120db at 20hz and can't cost more than 3k.  Another speaker is fine being down 3db at 35hz and can't cost more than 5k.  Does anybody really believe these aren't two different designs?  The first one is going to have to have most of the money in bass drivers and big boxes.  The second one will not.  

oops, I meant 3k for both or 5k for both, not one of each.

There are lots of speakers that don't play ANY genre well, and there are lots of really good speakers that play many genres well.  That's the disagreement with deep 333.  He thinks that no speaker can play a wide variety of genre's well.