i'm pretty much exactly your size and i ride a 158 YES great boobs. i have a 159 ride berzerker as my rock board and started out on a 163 burton floater.
i definitely find the 158 to be a good fit for my size, although i feel like i need a longer board for pow days. bearing in mind i live in NZ, decent pow days are few and far between!
Thnx! Good to know. I've always used longer boards! Maybe it's time I transition into shorter boards a little to mix it up!