I sat on one at the last big Bike Show. It feels big like the Valk.
There are a few videos on Youtube on the K1600.
The only thing that caught me negative were the saddlebags.
They open to the side. All my loose stuff would fall out
on the ground.
The Concours was just down the hall, sat it up, felt similar
in size, has AS much performance, costs a WHOLE lot less.
FWIW - - My FJR luggage opens from the side but it has liner inserts which take care of the "dumping on the ground" problem.