I installed a new system in my truck this last weekend - JL 300/2 powering MB Quart PCE 216's, JL 500/1 powering JL 10W6v2, CDT 6.5's in the rear doors, and the Clarion DXZ845MC.
The system sounds incredible - nicest sound quality I've ever heard, but I thought I'd post a review of the head...