Speakers that have holographic imaging on vocals..

it takes more than just speakers. you need to have some damn good upstream components (class A amp helps too). oh, and a great room helps.

rockports do it. merlins do it. acapellas do it.

rhyno

Agree with you on the Vandersteen's, Spendors and Spica's. Would add the Quad ESL-63 and Proac Response Series.

electronics do play a role..but even with my Spicas and an older SX series Pioneer receiver...imaging did not improve with either a musical fidelity or arcam amp...there was more detail and better bass control...but 3-d imaging was obtainable with every amp I used with the tc-50s....I believe it has more to do with speaker design than electronics....a speaker either has "it" or it doesnt in my opinion

Try smaller sized speakers, or add the medium-sized A-Physics to your list. Also the Genesis line, 501 & up, larger Harbeths, the biggies in the Tannoy TD line.
But, my experience tallies with the above: good placement & electronics do help...

Most single-driver speakers and electrostatics will image very very well, not only on vocals, but on everything else also. As was stated above, the upstream components are very important to this.