Can't answer your question on right spine for your bow draw and weight because I shoot 50# longbows and use the .500 spine Centershots.
I have been shooting the Centershots since they day they have been introduced by Beaman and absolutely love these arrows. Not on purpose of course but I have driven them into cinder block walls, stones, hard wood and just about everything else imaginable without breaking them. I have tried several different carbon arrows and these have held up the best by far.
Ron