If I had to make a choice, I would look into a 40lb for that toon. Scott, these things push a lot different then a tin or a yak. Your pushing 2 bladders with weight in the middle. I used a 30lb way back on a smaller one. It was ok, but on the larger toon, it was not that friendly. Why I went to a 55lb. When you want to get off quick, the 55 lb was nice.