Honestly....seal the doors with dynamat/sound deadener/second skin/raamat...whatever product you choose. Next, don't use the stock tweeter and see if you like it, then use the stock tweeter and see if you like it. I have a feeling it might sound better without it. Once you seal up those doors, put a layer of ensolite between the door skin and panel. When replacing the mid...make a pancake out of duct seal right behind it making sure to put as many non symetrical shapes as you can on the surface.
