135% vs 150%
There is no single sail that is going to give satisfactory performance in all wind conditions. Eventually you''re going to need a second sail if you want to cover a wide range of wind conditions. In your situation, I would suggest a 135% headsail, which can be used in a wide range of winds, except for light air. For those light-air days, when a 135 is just not enough, I suggest a drifter. If you add the cost of a drifter to your boat loan, it won''t add much to the payments, especially if you can find a bargain on a used sail, and, when the wind dies and your sails are slatting next summer, you''ll be glad you did. If you try to get by with only one sail for all conditions, your new boat will suffer in either light or heavy air, and you''ll miss out on some good sailing.