Spica TC50 and Quads have superb imaging. Also, I've heard a few single driver (Jordan, Fostex, and Lowther) speakers with great imaging too. Single driver speakers usually have more precise imaging, depending on size and execution. As a general rule, small 2-way and smaller single driver speakers have better "imaging" than larger multiple driver speakers.
Furthermore, I've never heard a speaker with 3 or more drivers produce imaging that was convincing. They all seem to distort scale and proportion, albeit while playing louder over a greater range.
Furthermore, I've never heard a speaker with 3 or more drivers produce imaging that was convincing. They all seem to distort scale and proportion, albeit while playing louder over a greater range.