Floor standers in a small room.

[DonBattles]

Early on when I was putting together gear for my 2 ch. set up I had picked up a pair of Sonus Faber Concertino's thinking I would be going SS for amplification. But as I did my research I decided that tubes were the way to go and sold off the SF's without every listening to them with my current gear. Something, the more I think about it, I regret. So enter the 4 in Fostex back loaded horns. First time with a single driver speaker and I just loved the detail but with the small driver I simply didn't get the lower end that I would really like to have, which I knew going in as was willing to try given the small investment in the DIY's. So enter the Omega Super 6's and I had detail and a pretty decent bottom end. The problem is while the overall sound a pretty good the speakers simply don't disappear as I would like.
So I have been listing the Omega's for sale locally and I really nice young man came over to have a listen. He brought over his pre, Mission Cyrus IIIi and PSX-R power supply, along with some of his classical LP's and we had a nice long listening session. Turn's out he's a sound engineer and took a particular interest in my set up and room. He felt the Omega's sounded great in most instances but something was missing. We spend several hours moving the speakers around and no matter where they were placed he felt something was just missing. He continued with a technical explanation I simply cannot remember well enough to put into words but basically he believes that floor standing speakers in general just are not right for that room. Something I think I had already figured out hence my desire to change them out and am considering trying out a monitor arrangement.
I know Dynaudio seems to be pretty popular here as of late and is one maker I am considering but would also like to ask for other suggestions that might be good for me. Keeping in mind my 40 watts of tube power making speaker efficiency fairly important.
I eagerly await your replies