I have vintage 70's Marantz(2252B), 80's/90's Denon(PMA-1080R), 90's Onkyo Integra(A-9711). All are very musical with the Marantz being on the warm side and the Denon and Onkyo Integra on the neutral/warm side. If all conditions are equal, I like the my 70's Marantz 2252B receiver the best with it's very fluid warm punchy sound that can be enjoyed for hours on end without fatigue. I have also used it as a preamp with different amps(Marantz MA-500 monoblocks, Acurus A150, B&K EX4420)with each only enhancing that sweet vintage Marantz sound and adding plenty of headroom.
On the other hand, some of the 80's and early 90's Denon and Onkyo Integra integrated amps are incredible bargains with good build quality and plenty of power to satisfy at low to high volumes.
Some of the following model numbers are Japanese market only and may have a corresponding US model number:
http://audio-database.com/DENON-COLUMBIA/amp/index.html
http://audio-database.com/ONKYO/amp/index2.html
http://audio-database.com/ONKYO/amp/index3.html
Bill
On the other hand, some of the 80's and early 90's Denon and Onkyo Integra integrated amps are incredible bargains with good build quality and plenty of power to satisfy at low to high volumes.
Some of the following model numbers are Japanese market only and may have a corresponding US model number:
http://audio-database.com/DENON-COLUMBIA/amp/index.html
http://audio-database.com/ONKYO/amp/index2.html
http://audio-database.com/ONKYO/amp/index3.html
Bill