Need advice on a very dynamic, full range speaker?

Presently considering the following - Legacy Focus, VA Mahler, Infinity MTS and Paradigm S8. Have only had a chance to hear the Focus and S8 at this point and liked both. Entire front end will be Krell. Anyone have any thoughts on these or other speakers that may fit the bill? Would love to keep the outlay to around 4-5K and will probably look for used.