Spica Angelus are imaging champs and pretty easy to set up, just don't get carried away with the gain knob on your preamp (I blew the woofers on my Angelus'during a party). Celestion 700's did a credible job as well, but in general I found "box" style speakers just aren't up to the task. In my experience the most holographic speakers are planars; I've owned Apogee Duettas followed by Martin Logan Quests and Aerius (the Quests are in my main system, the Aerius in my home office system) have been wonderful transducers. Planars are the way to go, but, be ready to invest a LOT of time moving them around in the room til you get the placement just right. Once you set up planars properly you'll never be able to go back to sealed box speakers for critical listening again. I've always used pretty good electronics so I really haven't noticed associated gear making a huge difference with planars (I'm referring to imaging only, of course any change in gear will be heard). Your choice of speaker wire will make the biggest difference with planars, experimentation is necessary. YMMV
Which speakers do the hologram thing?
Some reviewers talk about how speakers can produce a 3-D image so convincing that it seems one can "walk amongst the performers" or "sense the air between performers," or they may say how "each musician appears to occupy a solid space," etc. I'm not certain I have heard this. In your experience which spekers have this ability?