For you guys that have switched strings on the Mathews, I have a question, I am in need of a new string, I still have the original Zebra String on my LX, but I need a new one! Which is preferred for the material for a Winners Choice String (BCY 8125 or 452), and what do you guys use for the Roller Guards, I have heard that the X-Coat does not work too well with them???