I have a mint Sansui AU417 with a Rotel 965BXLE CD player. this is fed into a set of vintage Ohm model L's and a set of Paradigm 3SE's...for low listening I have a very old Pioneer SA5500II with a Onkyo DX1800 CD player that feeds a set of JBL riva's. I have a few tube DAC's but dont really use them much...and Graddo headphones..
I would keep every piece of old gear, mostly the older int. amps. I do believe they are gonna fetch good money in the future. I know a few very hi end recording studio's that wash down a mix on old analog amps before mastering...I had a few new digital amps, and the sound was very thin next to my analog gear...