I still have a pair of Audio Development CX6s (I believe). They were 6.5" coaxials with outboard crossovers. They were pretty nice, but I don't know how good they really sounded, nor how good the install was, because I was very much a noob to car audio last time I had a chance to hear them.
They may be going in my brothers car shortly, though.
They may be going in my brothers car shortly, though.