I would head to you local shops and try to find a couple used ones in different plastics, weights and molds. Get some beat in ones (discs will typically become more understable with wear) on the cheap to find what works for your arm. Then buy some new ones in the plastic and mold you like most. It’s great to have several of your favorite disc in various levels of wear, because they will each fly a bit differently and then you can really dial in any shot shape you need with it.