hobie say that square top sail is simply better all round

The square top sail is remarkable because it provides significant advantages in nearly all sailing conditions with practically no compromises. The most noticeable difference of the square top sail is the additional sail area up high. In light winds the benefit is simple. More sail area means more power, but contrary to what you might think the additional sail area actually makes the boat more forgiving in strong or gusty wind. Old school thinking would believe that the extra sail area up high would tend to tip the boat over easier, but in reality the extra sail area causes the sail to twist more and cause the top of the sail to flatten out. The net result is the center of lift of the sail moves down and the over all drive of the boat increases with less tendency to tip over. This is done automatically which makes the boat easier to sail in gusty wind.

The more subtle benefits are;

>> The improved planform of the sail. The most efficient wing or sail is one with an elliptical planform. The square top sail more closely approximates an ellipse.

http://www.hobiecat.com/sailing/sail_bravo.html

wonder why they don't have them on the H16???

if i'm going to spend a $1000 it may as well be on a new sail as opposed to roller furling equip. or self tacking...