Wide dispersion + high efficiency + detail + coherence in a speaker?

ATC Active 40 or 50.  Active means efficiency isn't a factor.  Lots of detail, coherence, dispersion.  The pro 50 is better but the home 40 may be voiced for home use and sound better at low volumes. 

When it comes to dispersion I think it's a question of whether the off axis response is just lower in volume or whether the off axis frequency response is bad.  When I think of bad dispersion I think of a speaker that has good on axis response but the off axis response is poor.  In cases like this you want to hear as little of the off-axis reflected sound as possible since it's messed up.  If the off-axis response is low in level but the frequency response is still good then I don't consider it bad dispersion.