Just a few questions regarding the 2006 Roush Mustang exhaust

The car is a 2006 Roush sport. I want to increase the sound to really loud, but not to the point of straight pipes or the loudmouth exhausts..say, if a stock gt is a 1, and straight pipes is 10, i want to have about a 7...now some said to switch out the pipe with another xpipe....if i do that, should i get an X pipe or H pipe? how do the prices, sound and performance contrast eachother?

Also, is it possible to keep the tips, and somehow replace the mufflers? I haven't looked too much under the roush so i'm hoping some people here can throw me some insight as to how the exhaust is set up in the car. Thanks guys!