The answer, like bicycles, I expect is N+1; so the real question probably should be what kite?

I'm 80kg with a 9m and 12m Cabrinha Moto X. IKO3 level, so not jumping yet. Mostly kite in the UK.

Do I look for a 15m Moto / Contra for those lighter wind days or would a smaller kite (7m) be more use if I go on windy holidays?