Who has heard and can comment on any of these brands??

I have Coherent 10's.  They are in my virtual system posted here.  I'm not familiar with the other brands mentioned by the OP.  Coherents will be in the high efficiency camp.  Very easy to drive, outstanding clarity in the midrange, great imaging, very revealing of amps.  I've heard more extended bass and more detailed bass elsewhere but the good stuff more than makes up for it and I don't feel like bass is lacking at all.