You would probably be alright with either the 134 or the 137. 137 would give you a better bottom end (probably a couple of extra knots), wheras the 134 would be more fun in the high wind.
If its your only board id probably go with the 137, nothing worse than those days where you can't go out cause its not quite enough. It depends on what your wind is like and how desperate you get

You might want to have a ride of the NHP too, nearly as good on the bottom end as the T5 as far as upwind ability goes, but as far as load and pop goes its a dream to ride. Doesn't spray in your face either