There is one bike that stands head and shoulders above the rest for the trip you want.
BMW R1200 GS. 400 plus klms on a full tank. Effortlessly cruise all day way above legal limits. Aftermarket accessories galore. 10,000 klm service intervals. No chain or sprockets. Heated grips ( standard ) a must as you probably know. Will go Offroad where a standard 4wd will go. Best resale of any motorcycle, bar none. I bought one new in 2004 for $21,500 on road and sold it three and a half years later for $18,500. Test ride one, you will be surprised