Hey Wicksy,
Your perfect fins will depend on your surfing and the waves you're riding. Ive found the quad setup works well in the Bam Bam, as the tail is very wide.
If you want the board to be really loose and the tail to slide, you can try a smaller set of fins (size 7 or below), if you want more drive through your turns you can use a larger set of fins.
This video was shot in every average conditions just south of the Gold Coast. Tim is using the Power Quads with a home made "Nubster" centre fin. Im using our proto type fins which will be released in a couple of weeks.