I remember Zilch recommending the BMS 4550s over Altecs. Thoughts? If I go with a higher response CD I could save the add'l amp and use the extra output channel on my XO to drive a sub.

BMS 4550 1" High frequency Compression Driver - BMS 4550 - BMS 4550 1" high frequency compression driver. BMS neodymium 4550 high frequency compression drivers are available here.