I'd go something around the 7m-7.5m range. Either Cambered or no cam would work well. I also have a Futura111 and use this board with a 7m no cam sail. I also weight 82kg and get going in 13+ knots with this setup and easily sail in up to 18-20 knots. I would also suggest a good fin. I use a 38 & 40cm C3 Venom on this board. 6.1m to 7m is a good gap also.