I don't have any experience with graphite, but my questions is how much does 5 pounds really mean to you on a solo portage? Are you struggling to get across in one shot? or doing double portages anyway?
It is hard to travel in the boundary waters without the occational meeting of canoe and rock. When going solo (or in general), I want to be more concerned with my safety then the canoes.
Repair is a also a question. I just repaired my kevlar canoe with a fiberglass patch and epoxy. How is graphic repaired?
I am curious what else you are considering brand and size wise. I am considering getting a new solo canoe. Have you looked at some of the Bell canoes? For kicks, I am going to try one of there
Rob Roy kayak/canoes
Robert