Well I'm close to you're weight range (210, but 6'3" w/ 12 boots)
I ride 2 159's (one flow infinite for fresh snow, and a K2 Playback for ice), a 157 Rome Garage Rocker for park, and I have played a few days on a 155 K2 WWW..
I ride the 157 mostly, even though I bought it primarily for park.. I rode my brothers 155 WWW a few times at it didn't feel to short either.. the only difference I notice is it's easier to press a 159.
I'd go with a 155/158, yah it's shorter, but they are so fun to play around on.