http://www.blaupunktusa.com/BlaupunktUSA/Products/Speakers/Overdrive/Coaxial/ODx573.htm

I used the ODx573, the total depth is less than 1 3/4" for a three way speaker. This leaves enough room for the power top piston to swing through with clearance.

Any 5x7 grille should fit as long as it clears the midrange and tweeter elements, or a can of matte black would conceal the silver trim on the factory grille.