Paddlers everywhere (myself included), are still mourning the passing of Royalex. As far as durability vs. lightweight it couldn't, and as far as I know still can't be beat without seriously "slapping leather". You can go to paddling websites and get up to speed on rocker, tumblehome and other design features, but if you're wrestling that beast by yourself mass would be a deal breaker for me. I was lucky enough to find a like-new Wenonah two years ago. If you watch craigslist you can still find them infrequently...family canoes where the kids have left the nest, they don't use them anymore and they don't know that the value has appreciated over time. Verify with serial #'s if you have to, some won't know what they've got. When the Royalex supply started running out makers offered the same models in polypropylene (plastic), but the weight is a dead giveaway. Royalex preferably shouldn't have been stored in direct sunlight for extended periods of time. Old Town, Mad River, Wenonah, Souris River...maybe even a babied Blue Hole!
RC, I didn't know you were a paddler, too...now I know how you're finding "hog heaven"!