I finally got around to replacing my front door Speakers and tweeters on the dash in my 2013 Aygo. First, I double insulated inside the two front doors, which is a pain in the a_ _. Then I put a set of Hertz component Speakers as recommended by someone here, and even with the original head unit, the sound is so much better.
HERTZ DIECI DSK 170.3 component set
