I'll get rid of all your problems by answering to all your 3 threads here...
If you want an exhaust that has a huge muffler at the rear and want it to sound good, get HKS CBE..
If you want the most subtle but still imho the most pornographic sound, get Borla CBE
If I where going to spend money now a days on my airflow, I would get the Vibrant Header and the Vibrant CBE to go with it
Tsudo and OBX will always be raspy and ricey
but I would definitely recommend Borla, by far the sexiest