Pulled the trigger on a Moon 861! Hope it pairs well on my Focals

A little late to this discussion but using a Moon 861 with bluetooth or AirPlay is like throwing money away.  Eversolo is good as a streaming DAC but seems like folks have a complaint about having to turn the volume up to -20 before it gets loud enough when using the preamp section.  I have a Moon 860A V2 and I would buy the Moon 861 in a heartbeat.  I'm too close to retirement and don't want to spend that much on another amplifer.  I bought my 860A V2 as a B stock unit at 40% off.  The Moon amplifier sounds superior to any other amp I own.

I have an Everstolo T8 connected to my Mark Levinson No 5206 preamp and it sounds great.  I have Dynaudio Contour 60 speakers and they're very revealing.  I tried a Moon MiND2 streamer and it didn't sound any better than the Eversolo T8.  The DAC is going to make the biggest difference.

I have the Eversolo A8 connected as a streaming DAC on another system, and it sounds excellent for what it cost.  Eversolo UI is great.  I stream with my own library, Tidal, Qobuz, and Apple Music.  The added bonus with Eversolo is that you can stream hi rez Apple Music natively.

Just wanted mention... Still using the cheap Yamaha RN 2000a as a preamp to the Moon 891. I turned down the bass and turned up the treble about 1/4 each... My  Moon sounds awesome. It sounds liquid like (because of the Yamahba) with a black background(because of the Moon). I am really enjoying it. Incredible amplifier and I have a 10 year warranty so I feel like I made a really good buy now that I have the sound I like. It might also have to do with the hours burn in. 

I have been very recently driving a Speaker design using Beryllium Tweeters with  a selection of permutations for the systems as follows:

1, SS System - Vinyl > SS Phon' > SS Pre > SS Power Amp 

2, Hybrid - Vinyl > SS -Phon > Valve Pre - SS Power Amp 

3 Valve- Vinyl > Valve Phon > Valve Pre - Valve Power Amp(SE 300b and PP 845)

4 - The same configurations above, but the CD is used with a Valve DAC. 

I can't find anything in the end sound being created and assessed to suggest that a Beryllium Tweeter is 'bright' and with potential to become fatiguing.

My take on a Beryllium Tweeter is the Speed it can present at; it can be lightning fast or less as a perception. It is dependent on the downstream permutation that impacts the tweeter's 'tempo'. I have not heard it present sound in a way I don't want to maintain as the experience.

If another is confident in their assessment that the Beryllium Tweeter is 'bright' and fatiguing to the point it is wanted to be avoided, I would suggest an honest appraisal of what is downstream feeding the signal or discover the failing within the listening space acoustics.