Paddle is a preference thing.
This bp paddle is the lightest paddle I have ever came across. The dihedral high aspect blade works well, is stable, lots of hold and it feels like your on a tear drop blade. The quality and made is nice. I tested the 83sq & 88sq blade & both had medium flex shaft 100% premium usa made with palm handle. The only negative with this complete paddle is your limited to 1 option to medium flex shaft which is too stiff if your technique is not that pro and your cutting it below 74" totall length.
At 5'6 80kg I would select 78sq because you have the option with soft flex shaft, same goes with 73sq blade.