I own a pair of quad 11L speakers paired with a classe dr6 pre and modded dynaco st70. This setup sounds fantastic in my 10 x 10 listening room.
I have owned various ss seperates and klipsch heresys, kg4's, snell type jIII, paradigmn v20 and several other speakers.
None of my other systems over the years have had the warmth,musicality, and a soundstage as wide and deep with the detail of my current rig.
I think it is more about matching components that work well together to achieve great sound, not just one pair of speakers, amp, etc.
You have already auditioned many very highly regarded speakers, but have found shortcomings with most of them.
You mentioned that this is a second system.... what are you using as a main system? I ask because from your descriptions of listening to the various speakers, I can tell you are a seasoned audio veteran and it is almost as if you are trying to find $600 speakers that have as full and detailed a sound as your main system.
I apologize if I come across as a jerk for saying this, it is not my intent. But $600 for speakers even used is not going to get much more than budget entry level speakers from any of the quality speaker manufacturers..... there is a reason why there are so many speaker company's..... if there was a $600 speaker that had low deep bass, magical midrange, and airy detailed non fatiguing highs that all blended together perfectly, then no one would ever pay more than $600 for speakers.The old saying applies you get what you pay for (to a certain extent in audio gear).
I would love to have most of the speakers that you have auditioned. I have heard several totem models and think they sound fantastic. I also really like the sound of dynaudio speakers.
One thing I did notice in my current rig though... I recently purchased a bryston 3b st amp and put it in my system in place of my dynaco st 70.... and while it had slightly more top end detail, my soundstage shrunk and musicality all dissapeared from my system. I will probably keep the bryston packed away in case I build another system, but it is sitting in a closet now.It is all about system synergy.
Good Luck and keep us informed.