I have a High County Archery bow (31" draw and 70#, about 10 years old) that I have used successfully for elk in the past. This year, I need to upgrade a few things on before I head to MT for the hunt, and am considering converting from the 23-17 Eastons w/125 gr Zwickeys to a carbon type arrow. Question - is it worth it and will I need to use a lighter broadhead and shorter arrow? The truth is, us old dogs don't change easily, and the tradeoff between speed and penetration is one I'm not sure I have enough experience to properly judge. Any suggestions on arrow selection would be appreciated.