New owner about to sell......questions for the experts.

[Papa Weeley_imp]

Try installing some Grip Puppies. Cheap ($10), easy (should take about 3 minutes) possible solution to your problem. It won't 100% cure that slight buzz you get, but it might make the difference for you.
I'm also presently a Bonneville/CB owner, and have had the same inner conflict about maybe selling one or the other, although for different reasons. Although I still haven't decided myself, I'd highly recommend getting more seat time in with the CB, as it's a lot more bike than the Bonnie.
Best of luck, whatever you decide!