Here is more info and comments on suggestions I am grateful for.
Room is approximately 19X19 ft, with a single corner, think of a fat raindrop shape, that is how my room looks like.
Room measurement with Tact showed pretty much flat curve from 150Hz and up, with no terrible nastiness below 150Hz, to the point where I see very little benefit from either tube traps or Tact.
The rest of system: Bryston 7B SST amps, BP26 pre-amp, Wadia 581i SE player, all interconnects balanced (VDH), speaker cables AZ Satori, IB2s sit on 20” SoundAnchor stands (including spikes).
I have heard MBL on several occasions, did not move me.
Heard only lower models from Von Schweikert, not impressed, will try to audition bigger ones.
Focal JM is also on auditioning list, as well as Wilson Audio (Sophia is in price range).
In regard to EB1, I do not see these as an improvement, in fact I think it would be a step back, as I prefer by a large margin IB2 with PMC’s dome midrange over IB1 (EB1 is kind of IB1 on steroids, more bass what is not what I am after, I have plenty of LF).
In regard to ISIS, yes, I know, hard to believe, but I should mention they were driven by some large VTL monoblocks and I must say that I was never a big fan of VTL, so take it with reservation. I actually heard my speakers with VTL and did not like it.
As mentioned, my comments are based on limited experience.
With present system I do get occasionally that eerie feeling of liveliness, even with less than stellar recordings as well as signal from cable TV when sometimes I am not sure where/who the voice comes from, as if someone in room is talking.
But I do not get fooled all the time. Am I asking too much?