In my never ending attempt to retain my youth, I just got one of these: Gemini Speed Freak 6'4" x 20 3/4" x 2 7/5"...the theory is that it'll paddle like a 6' 10" and with all the concaves and rail work it'll surf like a 5' 10".
I took it out this w/e and it actually works! Paddles well and FAST off the bottom. It's the same size I rode 25 yrs ago, now if I can only drop the 30 lbs I've put on since then!