Chrisla,
This may surprise you but I would suggest that you try the Spectron Musician III Signature before investing in Amplifiers in the $20000+ range. I currently own MBL 111E's and the Spectron after attempted pairing with almost a dozen more expensive amplifiers.
Many audiophiles speak about "giant killer" amplifiers in a lower pricing tier that dwarf reference amps in the $20k+ range. Typically those forum reviewers #1) either work for the company -OR- #2) cannot afford the giant amps and want to make themselves believe that the less expensive "giant killer du jour" sound as good, or better, than amps they cannot afford.
"I" am neither #1 nor #2. Audio, like many other passsions, is subjective and also can involve ego.
Unsatisfied with the pairing of many amplifiers to my 111E's I finally discovered the Spectron through an Audiophile friend who is passionate about tube amps, especially CARY Monos.
At that time, I could not imagine owning a less than 60lb. class D stereo amplifier vs. my 304lb. Monblocks.
I like to think that I am an open minded individual. For for less than $6000, I ordered the Musician III signature amplifier.
I figured that spending an evening with my neighbor who is a reknowned Cellist doing amplifier A/B/X amplifier comparisons should at least, be educational.
I never returned the Musician III Signature and all of my Monoblocks have been sold.
I have spoken to a few other audiophiles who have experienced this same magic with Spectron amps and MBL Speakers. It is my understanding that someone recently upgraded from 111E's to 101E's and ordered 2 Spectron's with the intent to BIAMP. Apparently he decided that the 1 Spectron amplifier had plently of power and so he sold the other one. If this person happens to read this forum, I would enjoy seeing comments.
After searching for years and trying many Speakers, I arrived at MBL. The company is rock solid and Jeremy (their rep) is a really great guy. I also had the pleasure of meeting John Ulrick, Spectron's founder and engineer. After reading the John Ulrick BIO on the www.spectronav.com website, I assumed that John is a guy who knows what he is doing. After purchasing one of his amplifiers, I now KNOW that he knows what he is doing.
Happy Listening!