RE: carbon arrows
Its kinda funny. Back in 1986 when started shooting compounds, everybody of course shot aluminums. Then bemans showed up and everybody wanted carbon to get more speed. And tired of aluminums bending. Now, a huge number of bowhunters want the wieght back for penetration and constantly complain about crappy straightnes advertised by carbon companies. So I can't tell you why to switch to carbons, I have questioned that myself. You can get aluminums straighter, no question about it, and more consistent of spine. And more choices of spine.
Even the so called quality carbons I have found to not meet advertised specs. Especiallly beman, and gold tip.