I have always popped my head in here every once in a while, but don't post too often. Always nice to see some familiar names when I come back though!
I agree with what you're saying, although its difficult to say for sure that any given TV will upconvert better than the set-top will. As well, I've got the output from the Fibe box going into an Xbox One, and then the output of that going into my receiver, both of which have their own conversion in them, so I just put them all at 1080p and calibrate the final output. Not enough ROI on my time to test all the possible combinations!