i.e. can u use harness? footstraps? waterstart? according to these answers select board.
wind: if average is 4bft that is a big windspan. i mean if you think in knots, it goes from 11 kts to 16 kts and therefore you can go thru a variety of sail sizes... what is the windspedd you really r going to sail most days? 3 bft or 4? over that sometimes?
when we have clear picture the ppl on the forum can be more specific i'm sure!