Ok, finally scored a great deal on a pair of KM6500.2 hlcds. For anyone interested check them out on amazon right now.

Is there a preferred amp to power these? I'm was thinking of going with either the DX400.4 or ZX450.2, pricing on both are fairly close however it appears the 400.4 would produce more RMS power bridged at 4 ohm, correct?

Or I currently have a 640 watt Kenwood 4 channel amp to power the back 4 cabin components and current 4 tower speakers and a 200 watt MTX to power the sub. So with those current amps would it be better to get a zx700.5, run the cabins and sub on it and the hlcds on the Kenwood?