Hey all, I have a friend who is in his early 60's and wants to get a yak. He is in pretty good shape for his age. He is tall and Skinny with long legs. He has had knee surgery a few times on one of his knees. I am paddling tapon 140. I love the yak but I want this guy to love the sport. So... does anyone have any sugestions about which kayak or length for this guy?