Thats a question only you can answer. Some people love bassani but to me they sound like ass.
I for one really like
Borla. The XS Pros sound fantastic on a 4.6 IMHO. Deep tone with a hint of exotic. Milltek also makes a great sounding exhaust.
Flowmaster has that trademark burble for the Mustangs that is also a favorite of mine. I like
Magnaflow just not on a Mustang. Too raspy.