if you have no shortage of bucks, go with the t-bird. But for the cost difference versus performance difference the duron is a better buy, especially if you're planning on oc'g. Like AMB said, the base difference in performance for the majority of applications is only 10-15%. Spend the saved money on additional fans, save it for a v-card upgrade, a better mouse/joystick, a hd cooler, ect.