You don't have to go back 20 years, that's too far, unless you recap it, but any Yamaha 10 or so years old would be good to go IMHO. My recently retired 2006 vintage Yamaha RX-V659 would work very well if I wanted to do like you are posting about doing. Unlike it's first replacement, a Yamaha TSR-7810, it makes more power than it's rated at, and if you just run the LCR speakers, it pumps out some decent power without cooking itself. I would say any mid level AVR would work fine for you.