Exactly what Onyx said Belbahayabusa. Spending the same amount of money for a used quality exhaust simply cannot be beaten by a brand new lower quality exhaust. And that goes for just about anything, both car related and not. And honestly check the forums and such for used mufflers if that's all your lookin to do, or kit's if that's the route you want to take. I got mine from MC and absolutely love them. I might change to a different Borla tho, my buddy has some he might sell to me. Mine are 3" and his are 2.5". We'll see tho when I get my motor if the 5.0 likes the 3" better than my 4.6. But no matter what I change to, it will always be Borla or equal quality. I wouldn't mind trying out some Corsa's to be honest. Funny thing is Corsa is literally 5mins from my house, and my mom used to know the owners.
Craigslist it up my dude! Post some WTB threads too when ya get the money. I'm sure someone on here will help you out