If you want a real lightwind-machine, then you are wrong at depowerable kites, I think. Fixed Foils in bigger sizes are still good to turn and have enoug power in low winds. Intermediates like the Oxigen (what a kite...), Samurai etc don't luff and sit just there, but are still manuvrable for working the kite. 7,8m or 7,2m for the sam is right, the 9m Oxi may be sweet, too! If you are confident with Buggykites, take one with a higher AR: Razor, blade, Nitro, RM, RM+.
Kingvalle