Thank's for the reply.
I'm in the middle weight wise - 78 kg.
I will probably buy a set of K4 Flex 16 cm + 10 or 11 cm G10 frontfins that I already have. Even though a bit on the flexy side I'll give 'em a try.
I must say that my Simmer Quantum 75 (quad) works perfect on our lake. Slower than some but perfect for making the most of the chop hops. I guess it'll be pretty much the same with the SB Q 87 when I bring it home from Diamond Head.