We're going to have a boat at the Boat Builder Roundup that you need to look at. It's the one for seashell--strider's daughter. It's a simple 3 panel but subtle variations in very similar boats can be astounding. I don't mean that this will be an astounding boat, but it certainly looks good and should paddle good. I'm certain we can build this boat in 12, 14, and 16' lengths and end up with a very nice boat. Check it out--you might like it.
I can also design a boat to your general specifications if you don't see anything suitable.
And last, because small paddled craft are task specific--meaning that you need to get a boat that fits your intended application, experience, and expectations--there ARE a lot of fine designs by other designers.
But none of them are as easy as me!