Last summer i guided the madison and the big hole out of a koffler aluminum boat. I actually liked it. The thing was heavy, not remarkably easy to row or hold in the current, but i knew that i could trust it not to get fubar'ed if i happened to touch a rock. It was my first summer ever rowing rivers and it felt good to know that i couldn't really destroy it on rocks. These days i mainly row on vancouver island, with rocky fast rivers similar to the OP. I wouldn't consider buying a clacka (which are in my opinion the best glass boats) for the island rivers because tapping rocks occasionally is just a reality. They are really sturdy though, and honestly, like others have said, once you row anything long enough you learn to love it. I had a chance to row clackas, south fork skiffs, and the big aluminum kofflers and because i rowed the kofflers the most, i liked them the most. Just my two cents.