I´´m alittle over 100kg and using a Surfboard only + I have very good skills for lightwind, I look for a Kite thats starts working around 23kt with well upwind in waves with some current with the wind mostly side-side/on windswell 2-4m 5-10sec. the Kite should feel small and i like them to be very fast in turning and flying speed.
My 9m starts araound 19kt but starts to feel big in 24kt the 6m starts at 28kt.
Please dont think that I´´m crazy but I have so many days were a real 6m will fit perfect but not many Brands carry them.
I used the 2010 6 m Rise and surfboard combo quite a bit last winter. The kite has a very good low end for such a small kite, so I think 23 kt would be right around its starting point. The best thing about this kite is how stable it is for a 6 m. I was very impressed. The 6 m Rise sounds like it would be a good fit for what you are asking.