I went from a R1150 GS ADV to ST1300's to K1200LT and back to 09 GSA.
The LT and the GW aren't very accommodating if you're tall, the seat locks you in one position with no wiggle room. I can do 500+ miles a day on the GSA easily. And those weird tiller handlebars on the LT!
2015 R1200 RT