There is bucket loads of tuning experience in Sydney, mate. Let that be the very LAST of your concerns.
Do a search on Power FC as there are HEAPS of testimonials, experiences with them already covered in this forum. Then buy one, then go to an experienced tuner, (different people will make different recommendations but i say go to unigroup), then have it tuned.
simple.
oh, and you were yelling cos you typed in all CAPS LIKE THIS!
Hope this helps,
Adrian