The Hobie 16 has a great reputation for surf sailing. The curved hulls, relable kickup rudder, and no daggerboards are a great combination; however, like the P16 it will not perform so nice in 10 knots. Modern ultralights (18HT, A-class, etc) perform great in 10-15 knots, but are usually a bit tender when it comes to hitting a beach. Probibly a good compromise would be a Worrell1000 boat. These have proven records going in and out of the surf, can witstand repeated beach landings, and are reasonably good performers. A nacra 6.0 or even a Nacra 5.8 would be my first choice. Since you are not class racing, you could put a more powerful squaretop main on it (Calvert sails used to make some great models) to give you some more power. Watch some W1000 or Tybee500 videos to see the technique for getting out through surf with this type of boat. It involves putting a man far forward on the leeward side and is not exactly intuitive but it is proven. Second choices might be an Inter20 or a Hobie Fox or Tiger. Third choice would be Hobie21, Hobie Miricle, or Prindle 19. You probibly want to avoid Mysteers, Tornados, A-class, Bimarre, etc.