interesting, ill check out some smaller boards. I really excelled this summer, gapping the wake of my fishing boat, on water 180s and in air 180s..
yea, being that you said your pretty sure youll be more on the freestyle side of riding, i would def. stay below 156 and above 151 with like a 153 being optimal...for reference i am 6' 210 lbs and i ride a 156 all over the mountain and love it size wise...if you have a pretty solid ground game in wakeboarding, ie hard edgeing, heelside/toeside sprays,etc, you wont have any problems on the snow
my buddy put me in Ride Contraband bindings when i started cause thats what was on his board, and i feel that the little bit of extra movement in the toe area of this style binding was similar to wake boots since your feet move around a lil in your wake bindings...i then tried some traditional strap snow bindings and couldnt stand how they felt...could be just me and in my mind, but its something you could consider since you too are coming from the water, contrabands are the shhhhhh, some will say otherwise tho, as just like flows, its pretty much either you love them or hate them...and i LOVE THEM
i started on a Ride Kink which i did and still do love, but it is a lil soft and gets chattery when riding outside the park, but is a great park/freestyle deck...this year i moved to a Never Summer Revolver, which is just wide version of the NS Evo since i have big feet. it also does great in the park, but is damper and a much better ride when cruising the rest of the mountain..just to give you some thoughts about which board to get...the kink is pure reverse camber while the NS's are a hybrid which has both camber and rocker....
good luck to ya, and welcome to year round boarding now, summers on the water, winters on the snow