About 2 years ago I purchased a "Caribbean Blaster" 110% Jib from Joel's guy in Ft. Lauderdale. It has a foam luff and I have loved it. I echo the remarks made about the size of this sail when used with Caribbean winds. The foam luff gives the sail better shape when furled and I don't think you loose anything when fully deployed as the foam luff just "fairs' the luff of the sail better to the "foil" of the furling mechanism. I can see no down-side to having a foam luff on a furling headsail.
I have kept my Gateff headsail for the day when I do more downwind sailing again but for winds of 15- 45 knots the Caribbean Blaster is a great sail.