Well in my humble opinion there is only one answer. SANSUI first, then Pioneer and Marantz about the same. I have had all the Pioneer SX models except the 1980. I had two SX 1280s at one time. I can tell you the sound from these did not even compare to the Sansui AU/TU 9500. I ran the Sansui on the same speakers and it was just not the same. The Sansui was so much warmer and easy on the ears. The bass was also better much more punch. And as far as build anyone that has had the 9500 series stuff or the AU 999 line can not knock the build. That stuff is bullet proof. As for looks I have gone to the dark side. What a rich looking appearance to have the dark face with the silver mixed in. To me it is a work of art. I had too many problems with the pioneer getting dirty pots. I would always have one of them with dirty switches that needed cleaned. Now as far as turntables I love the Pioneers. I will say Marantz has some great build to them they are bullet proof for sure. If I had to have one receiver to last forever I would put my money on a Marantz. They are one sturdy reciever. I also think the Gyro dial is pretty cool. But all in all for me my choice is easy. SANSUI.
I must admit I have never really owned that much Sansui equipment. I do find subtle differences in design of these three brands though which is kind of where I was trying to take what I was typing out. All three brands have distinct ways of designing their equipment in the past which can be preferred by owners.
I think what needs to be done here is one of us from each favored brand post the best in our opinion piece of equipment they ever made with pictures and information.
Like the Marantz crowd choose the best of what they have, the Pioneer crowd and the Sansui. Then post the results and let the result be that which one holds in their mind after reading the voted results.
Of course that would never happen because even amongst people in one fan base you will have wars of what's best and not.
I personally look for build quality, how easy it is to open and replace parts when all hell breaks loose, sound quality, how it holds up to its ratings, aesthetic look. If it can cook eggs or crush empty beer cans, Well all the normal things.
I honestly think what it boils down to is peoples lack of experience with different brands and equipment here!
Seriously how many people here (speak up if you're one) can say you heard the best of these three brands? Or can even say you heard some of their best in the first place?
Most of us like a build because that's what we know and have as a piece of our own system.
Few of us have probably ever had the opportunity to compare Pioneer, Marantz and Sansui to the point where any of us are qualified to say one way or the other which is best of the three you have had the opportunity to test out.
I need sleep lol.