Well I posted the thread about Revo because that was the only chipping company I had heard of down here in Sydney, but thanks to many people posting replys and some added research I found that the APR tuning is more reliable and not as aggressive to the engine management system.
Revo is good but I do believe that APR is better.
The only place ive heard of that have Revo is Peak Performance in Parramatta.
Mighty Car Mods did a episode on Reflashing your ECU and they went to Peak Performance with their MK4 GTI and used the Revo Technik software for the chipping.
The final numbers were pretty good and the episode is pretty interesting to watch. Here's the link below.
http://www.youtube.com/watch?v=mLvvxMCUo5E