Get what you can afford, a BBK ceramic is a great shorty header for the money. Bassani is over priced and i laugh at people that run um, pay double for the same gain...Really anything ceramic coated is the ticket.
Im not sure that all equal lenth shorties have a different sound,but Bassani is top quality,,installion is easy,and the gaskets are patented!! 1Hot5.0 did you get a new stang?