Classic "Form over function" problem as with lots of this stuff. The standard 'drop' handlebar to footrest relationship on the SRX was OK, but not relaxed if you wanted to "take in the view"! The rearsets (PC spell checker

) fitted to Sally definitely make riding much more comfortable, but "take in the view" riding is definitely a sit up and one handed or finger tip riding position. It would appear on the XBR that Jota bars and even a couple of inches back for the foot rests would make a big difference and allow some adjustment for your stature and the potential for the "Shortened petrol tank or extended girth"! syndrome.

A hump back seat would still be OK, providing the dense closed cell foam is used and not something that is soft and squidgy. The edges of the seat pan also need attention, as often the foam is cut "to fit" rather than overlap and thereby dig into the back of the thigh, rather than cushion against the thigh.
Main thing is to get the miles in and enjoy it!

My regards, Bill