1400 for exhaust headers to tip bro. Not worth it.
If you want a good sound, avoid a cannon. Get a 2.5" cat back for like $350, it's a bit droney but it's sound. Can get very loud.
You're a sydney resident yeah? If I don't sell my car this weekend I'll take you for a drive soon so you can hear the 2.5" catback.
Trust me mate, enjoy having an awesome car on your Ps, sell it later, get a GTST, GTS4 with turbo or even better, GTR.
Good work on getting that car too. It's a step down from a GTR but I trust you'll enjoy it.
Add me on facebook, I'll invite you to events that I get; http://facebook.com/e1usive