Speakers that have holographic imaging on vocals..

Flat panel tends to sound big and detail (guess the air move like plane wave). But to my ears, it is like a big peace of glass, huge sound stage but brittle. For vocal, the soundstage is sometimes exagerrating too much that I feel it like a big picture of mouth, huge but the big mouth does not have enough depth for breath.

Somehow I like solo vocal from small boxed speaker like ProAC 1sc, merlin, or SL600.... I think they have the right size for the vocal and if you place them right, they have depth too. For good recording, you can even feel the singer's head is rotating left and right. Flat speakers although have great detail but did not convince me that they can pick up good image over good box speaker. It is not easy for a head big like that can turn natually. For details, yes, flat speaker are very good. But to me, image is not just about big picture and details.

I am only talking about image on vocal. For big band music flat speakers have its own strength (soundstage, details) and weakness (bass shy).

Avalons.

Hands down, no question. I am surprised no one else mentioned......

I've had great luck with Thiel 2's coupled with an Aragon 4004 amp. This combo left any analytical tendency behind and gave a beautiful image, even in a rather crappy room!

I'd have to third lgregoir and itsall dark: Verity Fidelios did the image thing, but more importantly, the Sam Cooke you heard was a life-sized, emotive, 104.6 degree man. Don't get me started on Aretha, Janis, or Maria...(Muldaur or Callas).