Looking for some advice. Going to replace the control arm and suspension bushings in my 2001 viper GTS. Not sure if I should stick with oem rubber or change to polyurethane. Car will mostly be used for street driving with a few track days a year. For those that have switched to polyurethane, do you feel that they are superior to stock bushing? Are you happy with the switch, or would I be better off just sticking to the OEM stuff?