I will offer up this site below. You can find a lot of rewiews on a lot of yaks and canoes before you decide to buy one. If you can't try a few, you can at least see what others said about the few choices you have narrowed down to.
Kayaking & Canoeing | Kayak, Canoe, and Paddle Resource: Paddling.net
Just one site of many, I'm sure.