sry man but i didnt really understand anything you said
now tht kinda stuff i get lost on what are E cutouts or w/e????2.25 i belive stock, cat backs usualy move you up to 2.5
yeah bigger the louder, BUT if you dont have back pressure your car will choke. I would personally do E cutouts and leave the stock exhaust. it dont get any louder than that my man.
check out this thread
http://www.chargerforums.com/forums/showthread.php?t=52637
those are e cutouts. they are electric cutouts that you can open and close when ever you want to make noise. push a button and they seal up and you get stock exhaust or w/e you have out the back.