I like speed too but feel when you get faster you have less penetration in many cases. I have experimented with illegal light weight arrows and find broadheads can flutter/plane and lose accuracy. My bow is rated @ 333ibo and super light arrows are great with field points but not great with broadheads, mechanicals would help but I don't use them. Not sure what is really better but I prefer a heavier arrow and head. Heavy is less influenced if it does hit small twig/leaf.