Both are great bikes, but as pointed out, your height would lead you to the cb750. I've owned both and have the opposite problem of you, I'm only 5'10" and its all torso. The cb750 was a bit more unweildy to me for only a minor gain in performance (even when two up riding in my experience). They aren't too hard to work on if you are willing to read and put in the time. Also, parts and projects are very common in the North Carolina area. I'm in Charlotte, NC and if you have any particular questions or part needs, I may be able to hook you up. Good luck!
By the way, whatever bike you get, make sure it has a good clean title with the correct VIN on the frame and title. NC DMV can lead to some nightmare scenarios.