You've got good advice from James. If you go for 8.5/6.5 sails, than buy a board like Carve133 or similar. If you go for 9.5/7.5/5.8, then you need around 150 lit, and a smaller board in the future. You need to know that such a big board won't be ideal for the coast and is not good match for 5.8 sails. For now, it's best to decide based on your biggest sail.