i reckon it's all about how much you spend, i plan to spend close to the 1500 dollar mark you pay for what you get i reckon. an ebay built exhaust/muffler didn't get money spent on it improving it's performance it's most likely just a shiny knock off that will most likely sound like s*** (could be wrong tho).
im getting a full stainless steel system 2.5 to the cat then 3inch from the cat back with a muffler which i haven't decided on yet, definitely not a cannon tho but there's definitely a dump pipe on the end for sure

i've got a 300zx tt that has the same style system and it sound pretty sweet so that s the note im goin for