I,m using my 60 CS with a mounting bracket from Touratech, and I,m ver pleased with it.
I got the same bike as you (F650GS Dakar). The screen is good, and the size is no problem at all. Its also pretty easy to operate when I ride (although you,re not supposed to). Previously I had a StreetPilot mounted, but I prefer the 60CS. And its asy to carry with you when not on the bike. The battery lifecycle seems also to rather impressive. I had some minor problems with autorouting, but when I upgraded the firmware from Garmins web, all hickups disappeared. I strongly recommend the Touratech mounting bracket for both connectivity to power, as well as a rugged place to keep it secure, easily accesible and visible when riding.