I have OE M3 mirrors on my car. One of the previous owners retrofitted them and did a piss poor job of it. He did not modify the baseplate so part of it sticks out. There's only one bolt holding my left mirror on, and it's the wrong kind of bolt. Also, he painted the base red - I really would have preferred black. The mirror motors never quite adjusted properly either, even though I replaced both motors. One glass isn't aligned properly and the other shakes. As nice as they look, they have been nothing but a pain in the ass since I bought the car.
Unfortunately, the only aftermarket mirrors are the E36 and E39 style ones, neither of which look good on an E46.
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