D’Agostino Momentum stereo vs D’Agostino Progression Stereo Amp

Hello all, I was wondering if anyone heard both on the same setup and could point out the differences in sound ( soundstaging, timbre, bass and treble extension,...)
Maybe a bit early to say, but any technical or reliability issues with either of these gorgeous amps?
Any comparisons with other top amps (Rowland 825, Ayre MX-R twenty,...) 

Dan is one of the most disreputable manufacturers of equipment I can think of. I owned one of his Preamps. 8 years into its life one of the micro potentiometers broke. It was a custom pot and he did not keep any in stock for repairs. He told me to get a pot from Radio shack and mount it on the outside!!! A $6 K preamp back in 1981! If you think you are making a lifetime investment forget it. Do not go near any of his used equipment. If something goes you are screwed.
Thats why i got the Audia flight Stremto #4 power amp and am very happy, looks and sounds great.
If you check my system page you can read a brief comparison of the momentum and the Ayre monos (should be similar to the S250, just more power).

I had multiple cases of the original Ayre (non twenty) mono main board going bad after about 1.5-2 years - it was a known issue that I don’t think they were ever able to get the bottom of. The twenty doesn’t appear to have the same issue since it doesn’t use the problematic component. I didn’t have any issues with my twenties but only had them for a year. On my M400s, one of the input boards went bad after about a year. My dealer got D’Ag to ship me a new one and they showed me how to swap it out which was pretty straightforward.
Wow, to be honest I did not expect any negative comments, 1981 and Krell is a long time ago though...but sorry to hear about that negative experience @mijostyn
@bar81 I just read your system story, omg, nice to hear other audiophiles experience the same search for the holy grail!
Great to read the m400 dags deliver the goods, but at that time I guess the progressions weren’t available for comparison?
My future budget 🤪would not allow me monos, just a secondhand momentum stereo (or a new progression stereo which is even 5k more) and both of those are really stretching it way beyond what i can afford really.
Did you get a reason why the input board failed?
Would the dags sound closed in on speakers with soft treble themselves (I have old bw800 matrixes)?