I changed out the 3 dash and all 4 doors. I used 2-way Kickers in the doors. I regret doing the front doors, it made no difference as it's just for lows, as someone here mentioned and I didn't see until now. :-/ Everything else sounds good though. It's definitely brighter, but not too much. Just had to change up the EQ to compensate.
On a side note, did anyone notice an increase in engine noise after changing the speakers? I'm assuming the system's noise cancelling calibration is thrown off by the new speakers.