Removing the resonator was the first thing that I wanted to do but at the mufffler shop the mecanic said that it won't change the sound if you keep the OEM muffler. The OEM muffler is the main reason why the exhaust is so quiet. Replacing your muffler to any aftermarket or BMW PE is the only way to get more sound and combine that with the resonator delete will increase the sound even more.
Therefore I have scrapped the idea of the res delete until I get an exhaust. I have been looking for a 2nd hand BMW PE or Eisenman or even the RE Ikon exhaust but no luck yet.
Read a lot about the MMW CS Muffler and has great reviews but I don't want to buy it until I hear it in person.