At 150lbs you're looking for a board between 152 and 158 depending on what you want it to do. Shorter tends to be lighter, more narrow and easier to spin/turn with, longer tends to be faster , wider and more stable (other variables apply). Biax glass tends to be softer/more flex so if you're looking for a all mt instead of park ride go longer, or expand your board/model selection.
+1 on Signal, they're nothing fancy, but they deliver a well made high quality product at a good price. Bonus they use a sintered base on every board (iirc). I'm using a park flat with flux rk30s for the park and small mts.