I've tried Vapor 2007, GTX 2007 but didn't like them, as a fact, don't seem to like Gaastra sails at all. Also tried V8 and RS slalom, RS4 ans RS2 and like them a lot better!!
if you liked the V8 10.6, why change? The F-type isn't the board which can really get the max out of a high end racesail.