Hi,
I never did hear the Maestros. I got diverted into a pair of Sonus Faber Amati Anniversarios when I thought I was not keeping my MBLs. Well, I am keeping the MBLs and have since sold the SFs (which are an exquisite speaker). I still have another system consisting of Piegas. I've now brought in a current Spectral system to try out (first time I've heard Spectral gear as a set anywhere). So far, I have to say that it's quite something, still not ready to describe it. The Maestros remains an option and I am sure I'll eventually audition the pair. The SDR4000S Pro arrives tomorrow. I've had the MPS5, Paganini stack, P03D03 in the last year. My Boulder 2020 continues to impress beyond the others. The only other marque I've not tried is EMM Labs and the XDS1 may be up next, if the Spectral is not to my taste.
Did you ever audition Soulution or Goldmund? I believe the two are popular in HK.