FWIW, as you do not discuss a proposed set up and I assume that you will set the system up with the speakers on the long wall in a nearfield listening set up (6'triangular type arrangement) as its the only thing that I can think of that will give good imaging at moderate levels.
I would be looking for speakers with a very clean/clear but unemphasized tweeter - consider that most speakers are not designed to be heard that close, or a speaker with rolled highs. I finally got some speakers with Dynaudio Esotar tweeters and I can't over emphaize how impressed I amp. If my speakers were not 3 ways requiring some distance for integration I'd recommend them. But, I'd sure recommend considering any of Dynaudio's models with that tweeter.
I would be looking for speakers with a very clean/clear but unemphasized tweeter - consider that most speakers are not designed to be heard that close, or a speaker with rolled highs. I finally got some speakers with Dynaudio Esotar tweeters and I can't over emphaize how impressed I amp. If my speakers were not 3 ways requiring some distance for integration I'd recommend them. But, I'd sure recommend considering any of Dynaudio's models with that tweeter.