Semi,What you say about dome mids is true tonally.Unfortunately this does not translate to really good imaging though.I have used many domes and none of them have well focussed imaging.Cones and stats are much better in this regard.The Edgar Mid horn uses a Dynaudio D54 and this changes dispersion patterns[not to mention sensitivity],which improves imaging.These have negligable"horn" colourations if the horn is sand damped.
JT
JT