I would almost think...no, I would think, that setting up a room for bass like that would be even more important than the speaker cabinets or drivers. Just because your speakers will be able to reproduce extended bass, doesn't mean you will be able to hear it (and have it sound good) in a normal sized living room that's not extensively treated with bass traps, absorption panels etc.

I think you need to set up the box you're sitting in before the box you speakers as in.