You might consider a BMW for sport touring. Unfortunately, maintenance can be expensive if you don't DIY.
I'd love to have a R1200RT, but I'm friends with a former service manager at the local BMW dealer, and heard way too many horror stories. His advice was pretty much anything but BMW. I DIY, but would like to as little as possible. On top of that, the local dealership was just taken over by a bunch that has a BBB rap sheet a mile and a half long. Crookeder than the letter "S". I will go out of my way to avoid them, but it's going to be hard, they are acquiring dealerships (auto and other) like there's no tomorrow. R1200s, for the same year and condition as an ST1300, are double the money.
I will be taking a look at the ST registry. I would rather this next bike not be 10 years old, but I don't imagine one with less that twenty thousand miles would be an issue...