Best vintage amps (late 70s / early 80s) under $3k?


The golden age of audio was arguably the late 70s / early 80s, when corporations were willing to dump a ton of money into R&D / materials to make the best equipment possible. The downside to owning equipment from this period now is possible refurbishment and maintenance costs, but it seems good deals can still be had.

Wondering if you guys had recommendations of great sounding amps from this era? Ideally I'm looking for something that's 100W minimum, doesn't run hot, and under $3000 second hand.

I already have a fully refurbished late 70s Pioneer M-22 that outputs 30W into 8ohms. I love this amp, but being Class A it's like a radiator and not suitable for Southern California's summer months in a smallish room. More power would also be good as my speaker efficiency is 89.5db. I listen to many genres of music, so the amp needs to be a good all-rounder.

My current chain:

Turntable: Technics 1210M5G w/ AudioMods tonearm and Lyra Delos MC cart
Phono stage: Avid Pulsus
DAC: RME ADI-2 Pro
Preamp: Schiit Saga
Amp: Pioneer M-22
Speakers: Prana Fidelity Bhava
Subs: Rythmik L12
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@tomic601. I am not looking at any of this as an argument. To everyone else. I owned, and enjoyed, the Pioneer M22. And, my recommendation of the Nuforce is a sensible one, and in my experience, it betters many things mentioned here, and that is suitable to the desires of pts, without having to spend up to 3K, and without producing heat. I have owned every manufacturer mentioned ( with the exception of Atmosphere ), and many models from all of them. I like this Nuforce amp, as I bought it for the shits and giggles of it, at the $499 price. After a few hundred hours of constant music playing through it, I was quite impressed. I have tried it with several different types of speakers, and now run it exclusively through my mains ( 104 db horns ). There is no amp from my past I wish to own again. Not my Krell, not my CJ, not my AR, not my Stasis, not my M22, nor any from the above. I am curious as to why nobody mentioned McCormack. I am done with tubes, and I am done with Class A. All of those amps did a few things very well. This amp does all things very well. So, I recommend it. I sold 9 amplifiers from my collection this year, 6 of which brought me more than my $499., all because of this little fella. I do caution that it is high gain, with low input sensitivity, and only 80 wpc. I no longer need an amplifier that runs the equivalent to 4 or 5 incandescent light bulbs. I have a stove top for my eggs. I am happy listening. Although the STA200 is not class D, I do feel class D is the future, so why go backwards. I am not making the claim that it is the end all, for all people, but anyone I have spoken to who owns one ( some based on my recommendation ), loves theirs. Thank you, Enjoy ! MrD.
@bcaudio. Hafler DH 500 was mentioned by timlub. To the OP : Fast transient focus ? A definitive characteristic of live, unamplified music. Keep the M22 and ask Atmasphere how to control the heat issue, as he mentioned. Enjoy ! MrD.
I've enough suggestions now to explore and make a decision upon. Thanks to everyone for contributing!

Not really a practical option as these are extremely rare, but if you happen to get lucky and find a SONY TAN 8550 V-FET amp, grab it as fast as you can! Good condition one will cost $1500-$2000, only challenge is getting replacement V-FET if you blow one. It's in a different league than most of the amps mentioned in this thread, and I've auditioned many of them back in the days.
If you are into tubes, somewhat less rare are the Quad 2 monoblocks. Make sure they have the original transformers, all the rest is easy to replace.