I can't say much about the Pioneers, because I never was into them. I can say a little about the Sylvania. Mom gave me one when I was in high school (yeah Duffinator, I am that old) back in the early 70's. I'm sure it wasn't their flagship, as mom was not even close to rich, but I thought it sounded great. It was their CR 2743. I used to go look at the Sansuis, however and lust. A few years later, I would go into the high end stores and listen to the equip, then come home a couple hours later and listen to my Sylvania and think hey, their just is not that much difference. Wrong. The Mac dealer (my aforementioned 82 yr. old uncle got me looking at Mac) let me bring in my Sylvania speakers and do an A/B on the Mac XR14s. Needless to say mine sounded like they had a beach towel over them. A few months later I took home a MC4100 reciever to try. Ditto. It was like going from the ol' Craig eight track to a CD. I bought the receiver and speakers in '81. In about '83 I moved up to a pair of XR16s. I still use the receiver but preamp it out and use the MC352 for the amp.
I have a Dennon AVR3200 for my HT system right now and it can't come close the Mac, even using it's internal amp. Granted, they are in a different league, but I paid nearly the same amount for them, just one 20 years ago.
I traded the XR16s in on a pair of XRT20 Macs. I have not heard the XRT30s yet, as the Mac dealer here went OB. I am afraid to go hear them though, as I know I would have to have a pair. At around 30K they are a bit pricey, too. When I bought the 20s it was one of the final nails in my divorce coffin, even though I sold my coin collection, etc to buy them trying to keep the peace. That was back in '86. I still don't have a wife, but I still use the 20s!
Someone mentioned the Sony CDP101 earlier as a hall of famer. I bought a CDP302 when they came out and still have it in the closet. At the time, it was one of the best players on the market, especially at the price point. They sold as fast as they came in almost everywhere so were hard to find. We could possibly throw it in as a candadite for the hall as well.