I had a 1975 GL1000 in the early 1980's, it was as smooth as silk, with turbine like power delivery, quite good brakes, but wobbly handling due to soft suspension and a ton of weight.
I nearly fell off my chair though when Charles used Goldwing and "Musclebike" in the same sentence, that's just silly, I read all the magazines at the time, and all Honda was trying to do with the 'wing was "Out-BMW, BMW" by building a big water-cooled tourer, and they certainly never had any sporting pretensions. Hell, you couldn't lean one over far enough to get around a tight corner, they weighed a ton, and with shaft drive, you couldn't change the gearing.
Fantastic tourers, but not a musclebike by a long shot. Cheers, Terry.