Thats right 555

, I think the decision would be between a x-cite style board and a FSW, all brands do them it just comes down to personal choice what brand you go with. If DISM plans to sail it in b&j conditions and river conditions 50/50 a FSW may be more suited. I agree he also should go less litres as possible to get more out of the board but as the winds can be a bit flukey around there still enough volume to plane.
Some of the FSW boards can really hoot on flat water, I just got a exocet cross 94 and can hit 30knts on flat, but the board still has the capabilities to rip it up in slop.