Another thing a speaker needs to do to "disappear" is recreate a soundfield wherein the speakers do not cue your ear as to their location. This my DA-1.1's do very well but are not in the same league as the best I've heard in this regard.
Dodgealum (System | Reviews | Threads | Answers)
That is what I wanted to know.
A couple of comments based on above: Soundstaging will be profoundly affected by the room and setup, and of course the system behind it. No offense meant at all to Dodgealum, but the room in his system pics does not look like it's optimized for two channel listening (though a very nice WAF runaround on the corner bass traps!). Neither is mine for that matter. I too have to deal with a large TV screen between my speakers and that is a huge compromise. I usually put a large absorption panel in front of my screen when listening and that does help some, but ideally I would prefer to have nothing in between my speakers. I'm of course, assuming he's still using this room in his system pics and basing his comments on that.
As far as the DA1.1's not being up to the best soundstaging speakers out there; well, I would not expect a 3-way floorstander with five drivers to compete with a great 2-channel monitor or a single-driver speaker in this specific area that Dodgealum has isolated (sounstaging). That would not be a reasonable expectation IMO. A more specific comparison may be more useful in this context.
As far as my own limited experience with Lou's speakers, which has been limited to RMAF '07 (I think Ulysses) and Dan Wright's listening room (RMA's), in neither case did the speakers call attention to themselves in any way imaginable. Both threw vast soundstages and both were in very nice rooms (Lou scored one of the better [larger] rooms at RMAF that year, while most of the [smaller] rooms are quite challenging at that venue). No doubt coming into any hotel room is quite challenging, but the larger rooms there in general did sound better. Dan's room is excellent and well sorted out.
Hope that helps, Grant.