i emailed him, i dont think theyll take the power though im gonna give...he specifically said in that thread "dont get these if you're looking to give 2x+ the rated power"
10/12" 03-04 L7 or L5. L7 (silver cone) L5 (black cone), CVR, 10" CVX -- all kicker BTW. not a kicker fan boy, but all of those will perform nicely on 600 watts.