I,m thinking of a new crossbow because of my arthrictic left arm my old Pse Foxfire is too heavy & long. Now the Pse is 125# and goes threw deer at 30yds. and is very accurate out to 50yds. That being said why would I need a 175 to 225# bow that weighs 7-8#'s when I can get a new 125 thats only 5.5#'s?