The TSR-8 is light-years ahead of the 80-8 in every way… sound, transport tape handling, features… you name it. If you find a good condition TSR-8 you won't be disappointed. I have one myself, as do a couple others on the Analog Only forum. I'd be happy help you get acquainted with it once you have it, so feel free to post questions in the analog forum.
"If you can’t make a hit record with a Tascam or a Fostex,
then you’re not going to able to do it with a Studer or Otari!" -David Mellor