My all-time favourite receiver was the Luxman R-1120 ... 120WPC (measured higher) and an outstanding FM section, along with two decent MM phono inputs and also provision for two tape decks or processors.
Very rare, you see the smaller units on eBay (R-1070, decent, and R-1040, a budget model) for what I would consider to be high prices (often more than MSRP) and poor value, but the 1120 doesn't show up much.
One sold on canukaudiomart for $C 350 [$US 280] recently, a bargain.
If you've heard Mcintosh tuners / amps /preamps, you should have an idea of this units's Sound Quality, very similar overall.
Regardless of which vintage receiver you choose, they should be sent out for an alignment as the FM and AM sections will not be in proper tune after so long a time has passed.
I agree with another poster above who said Kenwood receivers were overlooked unfairly. Decent SQ and some of the world's best FM sections. An unfortunate oversight.
Most Classic Receivers, even budget models, with discrete radio sections, run rings around a modern AV Receiver with it's $10 radio-on-a-chip (and the same chip as all it's competitors) radio section. No comparison, really. Ponying up for a premium AV unit does not get you a "better" chip.
In the modern world the more advanced radio ICs are found in OEM autosound, which often perform better than their component AV counterpoints back in the listening room.
The best autosound can be found on pre-1990's OEM radios, but as in-car radio is seen as a priority versus as in the home, an afterthought, even the chips used in OEM radios cost significantly more than the AV Receiver's unit.