For a mint tune, I and just about 99% of the NSW guys recommend UNIgroup Engineering for tunes.
+ they look after NSW Club members (hint: join the club lol)
http://www.unigroup.com.au/Home.html
My advise, is dont change to the FF Plenum...there is no point unless you are after 500+hp and even then the standard one will do it.
So save the coin on that and get your turbo highflowed + tune (see the Hypergear thread in the FI section)
As said before standard injectors and AFM are good for 230rwks, which makes for a very quick and responsive street car