Amp's that are better sounding than a nad 3020

@holmz 

for sure. also adjusted for inflation, $135 in 1978 is equal to $606 in 2022. 

The Rega IO is probably the equivalent modern amp, which is $725

and the rega is supposedly very good

My old HK6200 integrated sounded pretty good. If you know someone who can fix the left channel (it drops pretty much every second, that is, one second you have sound, the next you don't, then again, then not, etc. etc., etc.), you can have mine for shipping and a few bucks. I've seen some for sale on eBay as well from time to time, perhaps even in working order.

I replaced my NAD 7250 PE with a Rotel Rx 1052 and thought it was a big improvement. It was $200 plus shipping used.

Yamaha A-S301, the Cambridge Audio AXA25 or used. My choice would be the Yamaha. It's as close to $300 as you will get. and has an unbeatable feature set.