Well I'm no pow expert, but from what I've researched a longer stick is going to ride pow better than a short one, but I'm sure you knew that already. You're gaining surface area by going w.... At the end of te day, it's going to come down to preference. I'm 230 and rode a 164w this year cuz I didn't know any better. (thought I needed the w for my weight). Next year I'll be on a 161 regular. That longer board is going to be heavier, which will affect your edge transition time.
"my only interest in statistics is in not becoming one"