I'm 60kg and I have the Futura 93l as my only board, with a 5.8m. It's fine to uphaul, and for me goes nicely as of about 14-15knts. If you plan to use this next board only for over 20 knts the 93l would probably be best, as CoachG says.
However, if you get a 111 or 101 it might give you the chance to use it more in 17knts ish, where it would probably be more fun than the 133. It all depends on how much overlap you want.
All I can say is that for my weight, when the wind is here, the 93l smokes. Jibes so instinctively and chop hops so easily once you've got the technique down.
JP Super-X 106l, North F8 Ram: 5.8m,