Hi Les-I think I have the last telescope I will ever buy-a Takahashi TSA120.
Smaller than 6" of course, but still a fairly large premium refractor. Going 6" means a big, heavy tube and an equally big, heavy mount-do you really want to lug that around as you get older?
I have the Tak mounted on a Vixen GPD2 mount with Synscan go-to, and the whole caboodle is a quite manageable weight.
Years ago, I had a 6" Starfire on a G11 mount-beautiful scope, but I am 68 years old now and could not manage the weight any more.
If you want your last ever scope, it would be a pity to have to eventually sell it and downsize if you could no longer handle it.