Re: newbie here, f30 320i
Welcome welcome.
So fast ask for poison... i left rehab so no advise but addicts will provide in due time, no worries.
To end, just get a LTA Compliant piece to save u the hassle with LTA bcoz i believe till today some LTA still believe some 'expert' that non LTA Compliant exhaust will affect the ride's steering wheel whrreby will affect safety.
As for brand go with the sound that u like best. Enjoy thy stay.