The best "imaging" speakers?

I think that you would have to look at what is the best imaging speaker/amp combination. I have a pair of dynaudio special 25's and Verity Audio Parsifals and they both image very well. Hook them up with VTL tube amps and triode and it is amazing. Very deep, holographic and wide, really makes feel like I am in the sound stage. Change to a belles SA-100 and we have detail, "slam", and tighter bass but the "imaging" becomes more two dementional. Just as wide but a lack of depth. I am listening to a Classe ca-2200 right now with the parsifals and it has some of the holographic imaging of the triode vtl but not nearly to the same degree, just as much air, some of the middle of the stage "you are there" but the slam of the belles as well. So the speaker and amp will give you this imaging factor and should be taken together. Per Kthomas, I do agree with the special 25, matched with the vtl st-150 is magic.

Asuming that great imaging is indeed what will satisfy (and that's NOT a given), you still have to make choices:

Minimonitors, whether alone (ProAc's Tablette is the best iamging mini I've heard) or coupled with a woofer cabinet (I own Parsifal's - also outstanding) can provide a particularly dramatic "object hanging in space" effect. Narrow baffle floorstanders with extreme cabinetry can also mimic this effect.

OTOH, Omnis like the MBLs (or, to a slightly lesser extent Ohms) can create "weightier" localized sources and a wall to wall soundfield that feels real in a different way.

Planars can create something in between, with more "continuous ambience" than minimmonitors and more specificity than most omnis.

I currently own examples of all 4 types (Maggie planars, Merlin VSM narrow floorstanders, Parsifal mnimonitors with separate bass cabinets, and Ohm omnis) and the imaging from each can -at any given time- seem more convincing than the others. At the moment, I'm sticking with the Ohms, but check back in a year....

Marty

PS I'd agree that, overall, MBLs are the most convincing imagers I've heard, but they have tonal issues that make them a difficult proposition for me (especially at their price).

The best you are there experience I have had was in the 90s with the 2C3D systems which contained Avalon/Spectral/MIT/ASC products, many of which you already own :-)
I have heard the same setup with Thiel CS6 speakers to similar effect.
I am getting very close with the Thiel CS2.4s, Bel Canto DAC3, Ref1000s and all MIT cables in my reference room.

note: I am a Thiel and MIT dealer, as the original poster knows.

Since sound from the speaker radiates around the edges of the speaker then you inevitably get edge diffraction which interferes with imaging.

There are two ways to deal with this:

1) Small narrow baffle so that the edge diffraction occurs very early in time and does not interfere with our ability to determine the precise source of the sound. A small box like a Bose Acoustimass achieves this and so do triangular and narrow baffle speakers to a lesser degree. Generally most speakers do not image well at certain frequencies due to the interference of the baffle dimensions.

2) Infinite baffle. This requires building the speakers into a wall or technically a "half space solution". In this case there is no longer an edge diffraction problem and the imaging should be unimpeded or as good as theoretically possible. (Of course an infinte wall is impossible so ultimately the imaging may be impeded by the side walls, ceiling and floor - in practice if you can keep about 4 feet away from the walls then imaging will be about as good as it gets)

A few years ago everyone was pumping line source speakers as imaging champs, like the Pipedreams and such. They imaged very good side to side and front to back and had dynamics like a Klipshorn, but the size and scale of the image was way too big (as Jax2 said). Picture a 3 foot wide nose on the singer "standing" in front of you. Not realistic at all, after all. I know there have been strides made to reduce this scale problem by tapering the response of the drivers at top and bottom, but it is still a bit spooky to my ears and not really natural.

Bob