Speakers with imaging "Free of the box"

Von Schweikert VR-4 SRs, they disappear and image well in my setup. I never even pay attention to the speakers as music doesn't seem to eminate from them, but rather more from the room itself.

JM Lab Daline series speakers

The Ohm's (in my case the Walsh 5 Mk 3) definitely do this. More importantly, they disappear as individual sources and a beautiful sound stage appears across the front of the listening room.

Duntech and Dunlavy, well built with perfect imaging.

I'm surprised no one has mentioned Alon. The Model I has stellar imaging that casts a believable soundscape. The dipole midrange mounted on an open baffle must be playing a role here. The box enclosing the 8 inch woofer is quite narrow which keeps diffractions to a aminimum.

The Totem Arro, Sttaf, and Mani-2 also deserve mention. In terms of currently available, affordable speakers, they're especially noteworthy. They disappear without much trouble.