Question: what board size.

sorry its been done 100 times before, but im not finding to much information specific to my needs! Im an intermediate rider flying vegas's and am progressing fairly quickly into the realm of unhooked.

i am currently riding a 136 - 42 X-ride north and would like something with a bit more punch, the x-ride is very light and bouncy with a flat bottom and has served me well up untill now where im using pop more than boost..

iv settled on the the Naish money shot as a high spec freestyle board without all the silly wakestyle features to take me to the next level but am unsure on the size to get and what relevance it has to my situation.

Im 75kgs 180cm tall and they make a 131cm x 40cm, 133cm x 41cm, 135cm x 42cm. with such a small margin of difference im guessing my previous conception that a cm here and there made little difference must be wrong!?!?

please tell me the pro's and cons of sizing in relation to freestyle riding.