Amps from the 1980's -- What gear holds up sonically? Reliably?

I would certainly add Audire to this list, at least everything built after the Model 2 amp and Legato preamp. The Legato is reliable, but I wonder about the people who rave about its sound. It is certainly clean , but it's power supply limits its dynamics beyond belief compared to newer models, i.e. Diffet 3, 5 and Andante. I even preferred the bulky Diffet1. The Diffet 2 is also very good, but it was designed before CD's and before Julius built his speakers for testing. As such, it is a little loosey goosey in the bass, compared to the others. FYI, there is no Diffet 4, nor an amp using a 4 in the model number. Instead, the early amp was nalled the Forte", because so much of his equipment went to Japan, where the number 4 is considered to be like our 13. After this, Julius continued the use of musical terms.

Wow! the NAD  Amp where my choice for sure back then i had a 2600 and a 7600 bridged 

 i still have them but now I've moved up to the S 100 pre/amp and a pair of S200 running my  Polk audio SDA1.2 Flagships 

I'm surprised I only see one reference to Hafler.  I bought the 220 kit model I believe for $400 and for the day, it was an amazing amp.   I doubt anything came close to it in quality for that price.  Not sure how it would hold up today but back then, I loved them with my ADS 810's and M&K subwoooofer

I have to say, that my old Sumo Nine took on all comers in my system,  I've had some very well respected amps in there... to be fair,  my old Sumo was hardly a Sumo any more,  it had a radically superior part upgrades throughout...  from the power supply to the boards to the wiring.. So probably not fair... It is getting upgraded again this minute with Newer, higher voltage, higher mfd and lower esr supply caps now as well as a minor circuit change with all new Higher quality output transistors.  I'm excited to get it back.  I've always been told that the 2SC1831 could not be replaced.

I just came across an old PS Audio 200C,  I immediately thought of this thread,  wondered why I didn't think of it sooner,  then the PS Delta series came to mind,  the Delta 100, Delta 200 and 250 Delta mono blocks.