I'm 6'1, 200lbs, sz 11.5 boot… I prefer to ride a 154-157, my most used board is a 152.
When it comes to board size for you, I'd stick at or just or under 160. If you plan to do free riding/AM, I wouldn't go too short. Its so much a matter of preference, strength, feel, board profile, rider style… its hard to say what would work best. I will say this though… I've taught a lot of friends and family how to ride, what I noticed most was how beginners confidence grew much more rapidly on a rocker, slightly shorter board. It seems as though they were able to initiate turns fast, worry less about catching an edge, and inevitably progressed much faster than those who battled through a fully cambered longer snowboard.