Well if you are going for looks, you can get a Vibrant exhaust. It's stainless steel and the dual tip look to it. Some people have upgraded their neon to 2.5" Dynomax piping from the factory 2.25" and put on a 50 series flowmaster and had some custom tips put on. Both sound nice and not like the "angry weedwacker!" Stay away from the pacesetter cat-back exhaust, it's crap! I have a post on here about it with pics. Borla also makes a nice muffler for the neon that mounts in the factory location and has a nice mellow deep tone to it.