I think the grand is one place cats shine. Any big water brings out their benefits, slicing through the waves instead of getting tossed so much like a round boat does. But I don't have gear in front of me (except drybags on the front tubes) and I'm not using a floor. Even with stuff up there I believe the pointy cat tubes make you slice through vs a round raft bow. Take a cat!
A girlfriend on my last trip had a 14' maravia and rocked it. She had a floor and a cooler up front. She's been down the grand twice but is pretty conservative. That is, until she inadvertently took the "fun line" through Hance. She ran the hole at the bottom, and "front sided" hard and did great.
You guys are funny, some think of it more as "knucklehead"!
I am a river, babe - I've got plenty of time, I don't know where I'm going, I'm just following the lines..... - "We are water" by Shaye