typically, most people like to keep their tweets and mids somewhat close to prevent "separation" ... but really...you should just put the mids in (i assume they're going into the doors) and move the tweet around (or better yet, have someone do it for you) to where you like it, i'm sure you could make a plate to accomodate a 6.5 mid and a tweeter in the old 6X8 spot...or use the mounting location for that as a base for DIY door pods...you want it to look good right?
