You're bound to break parts one way or the other. Alumiinum replacement parts cost more, add weight, tend to bend and stay bent. Stick with plastic if you're prone to many crashes, go to carbon when you are good to go. Remember though that even if you have a bad crash sometimes the obvious broken part also hides hidden broken or bent stuff. (i.e. bent hingepins, bent axle stud, tweaked chassis, all sorts of stuff) Always make sure the parts on the car are always good to go. Sometimes folks forget that their parts can fail and lead to a crash. Something to think about. Invest on another second hand car as backup parts so that when you do break something. It won't be an unexpected parts buying frenzy.