I heard some big Ushers at a show some years back and was also very impressed. In terms of imaging the speakers they reminded me most of was Joseph Audio, but I can't speak to how they compare on the other parameters you mention. JA speakers sound very natural to me, but not sure if they have the jump factor, etc. you're looking for or not. Certainly worth a look imo.
In terms of dynamics and jump factor I might take a look at some PMC speakers. I think that powerful dome midrange driver might excel in that area, and from what I've read they image quite well too. The Evolution Acoustics MMMicroOne might be an interesting option too. Best of luck.
In terms of dynamics and jump factor I might take a look at some PMC speakers. I think that powerful dome midrange driver might excel in that area, and from what I've read they image quite well too. The Evolution Acoustics MMMicroOne might be an interesting option too. Best of luck.