Reliability of Dan D'Agostino equipment

I also wasn't aware that they were originally Krell? 

Dan owned Krell, I think, sold it, became unhappy with the direction of Krell and started D'Agostino.  They have always been two separate companies.

I had the budget D'Agostino amp, the Classic.  It worked fine for the guy who sold it to me, worked fine for me driving my Martin Logans, never so much as a hiccup, and I haven't heard of any problems from the guy I sold it to.  That's all I can tell you about the brand's reliability.

It's highly unlikely D'Agostino has maintained it's level of perceived "ulra fi" with shoddy with reliability and customer service.

That said, unless you're buying from a private seller, a legit dealer is the way to go.

The Dagastino integrated amps have some issues. If you want bullet proof in this class talk to GTT Audio and get an Audionet amp.
I also had a lot of good fortune with Mola Mola. I also think the new Dagastino stuff is too colored. It’s not neutral. That’s why a lot of Wilson guys like it since older Wilson was analytical. New Alexia-V and Alexx-V are perfect though.

Another good brand with few problems is the Gryphon amps.

At the prices the really high end equipment manufacturers charge, those products should not only sound great but do so for a long time w/ virtually no reliability issues! 
 

For myself, I judge whether to buy audio equipment or actually almost anything of at least decent quality based not only on performance but long term reliability vs the cost which then for me defines it’s ultimate “value”. 
 

I think todays modern speakers have a good chance of lasting a long time w/ better quality drivers & crossovers than in the past but I’m not so sure about today’s complicated electronics. That remains to be seen.