You might consider the Freeride 67. It is a pretty playful river runner. I know some larger people who paddle it and like it. I paddled the 57 and thought that the speed and looseness on waves was great. It was in Glenwood at high water but it accelerated down the wave like no other. I did not paddle it in a hole. You are not going to be pushing the envelope on McNasties, and such but comfort is great. The large stern will support you at the end of rapids.
That said I paddled all the high end playboats last year. The New Rockstar was the best all around. They narrowed it up which makes it less like paddling a cork downstream. I bought a Large Jed just because it loops huge and is fast on a wave and got a killer deal on it. Paddling it downstream you would find yourself tripping over the edges.
friend of the fork, knife, and spoon