I have a '92 Mazda Miata, and the headrest speakers are blown. I was wondering if I should replace them with with replacement rectangular speakers, or the Clearwater circular speakers. I'm also debating replacing them with regular 3 1/2in speakers. This is a cheaper option, but will these distort at high volumes? I replaced the radio from stock, to a SONY (it has both of these on the front) 45Wx4 XR-CA330 I don't know which is the model number...