Ben(ironben) started to learn on surfboards last year,maybe he will give you first hand experience.
lol , tx Ivo
I can tell you this, i tried few boards before i end up buying one. i went with truster 6.0 axon
nice board fast turning, but for me i think i may need bigger board.
in mean time i rode few more boards around here, one is firewire 6.1 and 19.5 wide but it feel much wider than mine (19.5 too), more stable, easier to ride back and fourth and jibe, not as fast turning as my axon. so go few inches over your height and wide to get ur balance and jibe and go from there.
hope this helps a bit