Locally made systems (MMS, RMS) are expensive but very good quality and design and use top class materials. But if you want the "angled" look the local ones don't do those (since the angled rear pipe is an inferior design).
If you are putting the system on an MY06 then you really must get an ECU re-tune of some sort otherwise youwill probably have problems with it running lean.
The thing is, you have an expensive car so don't skimp on a quality exhaust and get something from the turbo back otherwise you are wasting your money.