i think you should give your bike a few more miles before you start moding, i did my first mod right after 800 miles
:yesD&D is known to be loud and obnoxious!
Are you considering gp style to be like the megaphone tips, or the Termignoni gp style can? I was more than satisfied with the Termi sound just being a slipon. However now that is mated up to an 05 header, it sounds bad ass.