I had or heard the vintage before it was vintage. Some sounded good. Some was ehh, well. Some wasnt that good. I never heard Pioneer setup I could stand for more than 5-10 minutes. Denon was clean but all midrange. I had/still have a Harmon Kardon 730 receiver and the only thing I ever heard that IMO sounded as good was Nakamichi separates that a friend had.
I went to stereo stores but many of the salesmen seemed to turn everything up too loud. Went to audition Carvers Amazing Loudspeakers which was hooked to a Carver preamp (& maybe amp). the salesman bragged about the haulographic (setting ?) on the preamp. It was horrible. I couldn't believe he was so proud of what my son and I thought horrid. One point I'd make is that even back in the 70's & 80's you had to spend more to get more.
BTW I'm planning to get my HK730 restored to see how it stacks up against my existing amp