Random thoughts on NC and bigger bike:
I was able to acquire a bigger bike.... used and a good price.... and I understand why you might want one.
Still, the NC is my favorite ride even though I won't be getting rid of the FJR1300 ($4300 with 35K miles) anytime soon.
bigger bike: smoother ride, shaft drive, fast as all get out, poor gas mileage (46mpg), adjustable windscreen
smaller bike: nimble ride, easier engine access, great gas MPG, fixed windscreen
Next Spring's cross country ride will be on the FJR.... for the sake of the smoother ride.. but it won't be as comfortable as the NC until I can add: heated seat, highway pegs, heated grips.
If I absolutely HAD to part with one, then the FJR would go.