Welcome to the forums, the F650GS is a pretty cool bike, but I think the xsr700 would be pretty cool to use to build on. A lower seat would be nice, Not too sure how it would affect you're arm positioning depending on how low you drop it
I am 5' 7'' - 5' 8'' and the XSR700 seemed maybe a bit taller than the F650gs. I think it had to do with the wider seat and maybe because the steering wheel on the XSR is a bit lower so you have to bend a little.Welcome to the forums, the F650GS is a pretty cool bike, but I think the xsr700 would be pretty cool to use to build on. A lower seat would be nice, Not too sure how it would affect you're arm positioning depending on how low you drop it