Any speaker made by Von Schweikert is great on vocals but also huge soundstage, pristine non-fatiguing highs and tight, powerful bass; integration of drivers mimics the ideal single driver point source. Go hear them if you get the chance.
Best speaker for vocals
I asked before about the 803d vs the Martin Logan Spire but my question should have been what is the best speaker for vocals? I have Klipsch RF-7s and they have a great lively sound but I do feel like the midrange is a bit hollow at times. What are opinions on a speaker that is known for its midrange? I listen to David Gray, Avett Brothers, Ben Harper, etc. I want the most realistic vocals. I have read that Harbeth Super HL5 may be the ticket but it is not full range and there is no matching center.