I would prefer the 6" driver myself.
4,5,6,7,8...Nearfield,
the bigger the driver the more Bass is rule of thumb, right?
6" is often the "middle choice" capturing the bass and the midrange...
smaller more midrange/less bass which is often accompanied with a sub. larger more bass/less midrange.
Dance Music you might want to save for a 8" or a 5" and sub is really nice, imo.
As far as brands KRK and JBL are both well known.