Dungbeetle depends a bit on what you want to do? I'm still Sup racing my old second hand 12'6 and having a ball on it in the surf when its light. Depending on your size and ability to throw around a big board something around 10' gives you the option of still being able to SUP. Other wise if its a dedicated light wind wave ripper go for something a bit smaller with good wave-sup cred'.
Good drawn out tail rocker gives ok speed by sailing it off the tail and setting a bottom turn. Moving your feet around and shifting weight to tail turn it off the top whilst timing it to come down with the foam on the tail so as not to nose dive takes a bit of practice.
Just remember to mother it as most SUP's are not built for planing as such and getting treated like a real sailboard. That said I give mine heaps in the surf as well as on the drag strip

. Either way you will have a hoot and increase your time on he water, sure beats paddling them

Enjoy!!!
