Balls. I'm a few inches shorter but about as heavy. When the 60kg guys on surfboards can't get away from the beach on 12m kites, I can rock upwind on a 10m without effort.
I've had Liquid Foil Fun Fish, Slingshot HoverGlide, Axis kite foil and now Axis S-series 148 Ride board and the Surf carrot, and the 72 and 82cm S-series wings.
My current setup is Axis 75cm mast and 82cm wing, with the new Surf carrot or Ride 48 for 10 knots or less. The lake is shallow, and I prefer the crispness of the shorter mast over the 90cm one I have. Tempted to cut it down to 82cm though...
I've ridden three different Naish foils and board, three SS boards and HG foil, Cabrinha DA and the latest Carve, Alpine Access IIRC, a few Axis wings and probably others I can't remember.
You get what you pay for.
The Axis masts are the most rigid, no question, and
tough ... and I know because I'm impatient, lazy and really hard on gear. I destroyed the unbreakable Fun Foil board, and continually bent the 1 inch thick fuselage running into the shallows while learning. I've run into the shallows mid-gybe on the Axis board hard and fast enough to twist the bottom of the mast microscopy (now 1mm offset, only person in the world to do that :D ) but the board is undamaged. Unlike the Naish or SS boards that cracked around the boxes

I found the SS way too heavy. The moment I picked up the Axis gear I knew I had to sell the SS. The Axis S-series foils are a tad heavier, but still not as bad.
Low aspect big wings like the Naish Surf or the Cab Carve are too roll twitchy for me; I prefer a little stability and the higher AR wings seem to offer that, with no loss of fun in waves.
So it depends what you want to do. I tried jumping for a while, but the weight of the foil gear hanging off my feet put me off. I do like boosting *off* the board though, good fun.
Surface area of the wing is what you want to consider IMO. For reference, my 82cm is ~1500cm2 and the 72 is ~1200cm2. I greatly prefer the 82, as it glides better for longer with less power from the kite, and the cruising speed is a tad lower, which makes riding waves and especially lake swell so much more fun.
Compare a few different sizes and see what you think.