Of the B/W sets, I guess it's my DuMont RA-103.
If a visitor to our house asks about old TVs, I know I can just turn this one on and it will always look & sound great -- no hiccups, no apologies, no explanations about how 60-year old TVs can't be expected to look good like new ones, etc.
Subject to future revision, of course. In thinking about this, I came up with a two- or three-way tie for second place. And, depending on what I'm working on and how the project is going, the answer might often be "The TV that I'm restoring right now!"
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html