My wife had a 10 foot Sotar when I was paddling my Force XL, I thought the 10 foot Sotar did better than the Force XL with me in it. She only flipped that boat once, and I never did, even at a 300 lb load. I could submarine my Force pretty well, and it felt squirrelly before some of the water drained out. I'd buy an 11' Sotar in a heartbeat (if I could afford to). I sat in a new Force, and I don't think my 6'6" frame would do too well in one. I really had to balance where my ass was in the Force XL, a few inches dramatically changed the handling for me. I have short legs and a long torso, and I'm not very flexible in the middle. I put a lot of weight up high on any kayak. Lately I've been paddling my buddie's 14 foot long Momentum Harrier kayak, with 14 inch tubes and huge upkicks, I love that thing. I'd love to have one about 2 feet shorter and made of PVC, with a few more bailing holes. I agree with Grateful one, the Sotars bail so fast, I don't see much of a need for floatation.
Wishing I was on the river instead of surfing the web...