Well, I had numerous bikes, like you, most of them beemers (boxers, k and f bikes).
Most of a time I ride with the wifey (2 up), recently she was growing uncomfortable on motorcycles, and almost pull the plug on riding. About a year ago I bought 2016 C650GT, with 250 miles on a clock (!), and the wifey absolutely adores it.
I installed a top box: a tad of extra cargo space and a back rest, both rather handy.
From my perspective, C-GT is one of the most comfortable rides I have experienced. It is not too heavy, not to light, just perfect. As far as scooters are concerned, I owned Silverwing, Helix, Burgman, Vespa, not necessarily in that order. I really liked Silverwing, but GT’s performance and handling is superior. I am anxiously awaiting an update to GT, hopefully it would come soon. I trust that the new C-GT will have some of the C400 features, but only the time will tell.
In a meantime, and almost 6K later, we are enjoying riding Texas Hill Country, 100-150 miles rides. The wild flowers were/are spectacular this year...
I have installed stronger horn, now I can scare truckers. I strongly recommend doing this, as well as aspherical mirrors.
Safe riding!