Indeed. And if you want something like that you might consider what I have found to be the single finest full range from the Godfather of full range drivers himself, Ted Jordan, the JX92 (the new version is the E100HD). If you're willing to do something like that to your dash, this driver is it. From 45hz on up. You could augment it with the Anarchy in the door or run them right down to a sub, no problem. You would think that off axis response would be a problem but the cone behaves in a bending-wave fashion so that the radiating surface gets smaller as the frequency gets higher. I've owned them, they are phenomenal. How many people do you know that run two 5" and two 7" for a front stage?Hmm a bit relieved to know that then. I was thinking both drivers on the dash for staging and imaging. So are you saying stock locations for the 6.5s would be more than sufficient (as long as doors are well-deadened)?
http://www.eadsweden.com/shop/17596/art74/8372674-d191f1-EAD_E100HD_v1.1.pdf