Anything SS sounds better than D'Agostino ?

That’s because it was the MC303! It’s a great theater amplifier but unfortunately, it doesn’t cut the mustard compare to the MC352, MC462, MC602, MC2301 tube Monoblock, MC2000 Tube Stereo, MC2102 tube, MC272 tube, MC501 Monoblock, MC601 Monoblock, MC611 Monoblock, MC1.2KW - MC1.25KW Monoblock, or the mighty MC2KW Monoblock amplifiers. Sorry, these are just in a different league even within there own brand. 

Soulution amps, anyone heard them ?

There have to be at least 20 companies that make a statement amp that is every bit as good as D’Agostino.  At that level, to say that one is better than another is of limited meaning.  More important would be personal preference, and synergy with source material and other components. 
Also worth noting that at the statement level, some types of implementation are far more expensive than others.  You could make the argument for example that statement level Pass is a much better value than statement level Dartzeel, if sonics are the only consideration.

The Soulution amplifiers are really nice as well as Spectral and CH Precision 

@inna  sorry for the delay in responding to your question about S250 versus M900u. I still own both amplifiers, and I have been so engaged with the D’Agostino in the system that I haven’t put the Luxman back in yet. I will, and it will be interesting to hear what I hear then.  My gut sense right now is that the D’Agostino will prevail for my speakers and system.  But it is not certain, as the Luxman is a great amp in its own right.