with 10 knmts you need something big like 16 sqm. In this size the Rhino 16.0 is still one of the best.
But 10 knts isn't much, you may consider a Flysurfer Mastair 16.
Just heard once again that if the big tube doesn't go, the MastAir still pulls. It is nothing for jumping, but is provides constant pull at 10 knts.