I can't really add anything that no one else hasn't said already. It comes down to budget and what you like. There's TONS of aftermarket support for all the major players in the game. And you can usually find one that's been farkled up pretty good for a decent price.
Since I don't know you personally, are you a taller or shorter person? Is your torso longer than your legs or vice versa? Are you nutrionally advantaged or Starvin Marvin? Each of these could play into your decision just in how the ergos are on each bike. I went with the FJR since I had an 06 as my last bike before my kid was born. Sold it and took a few years off. Bought a used Sprint ST1050 but since I've had both knees partially replaced, my legs kept hurting. Upgraded to a 2015 FJR and haven't looked back. Was seriously considering a Multistrada or possibly the new BMW R1200RS but the price tag and cost of maintenance didn't agree with my budget.
Go sit on a bunch, maybe find a dealer who will offer demo rides, do lots of research. In the end its just a matter of personal preference.