mapman,
Believe me, I couldn't let go of the MBLs for the last ten years! I truly thought I would never sell them as they were a "unicorn speaker"I happened upon for a once-in-a-lifetime price. But given I switch around my speakers I couldn't help but notice other speakers spending more time in my system, a bit easier-listening, traditional speakers (and some floorstanders like the Thiels with deeper bass). I'd put the MBLs in and go "wow" for a while, but for whatever reason other speakers would end up as my mainstay. I actually have a very good room for the MBLs, one designed with an acoustician, and with very good flexibiity in terms of modulating how much reflectivity is happening. So I dialed in those MBLs really nicely.
I set them up again the night before the buyer was to show up and was again gobsmacked at what they could do in terms of imaging and transparency, even these small MBL 121s could do an amazingly persuasive orchestral spread - very convincing for eyes-closed listening.