RE: Hypersonic 133 vs. F 148 (both 05)
It depends on which sail will you use most: if you are on a 9.8 80% of the time, in around 10 knots, go for the Formula. If you are mostly on a 7.2 and only ocassionally use 9.8 go for the hyper. It will take a sail that big, but it's not ideal.
It's next to impossible to find a board that will work equally well with these two sizes.