I would suggest you look on Fast Intentions website:
https://www.fastintentions.com
You have several options when ordering your exhaust from them. One of which is resonator options. You have three to choose from:
1. Non-resonated - Loudest option
2. 12" resonators - in the middle
3. 18" resonators - quietest option
I would say your best bet would be to go with the 18" resonators. You also have the option of adding race cats. I believe these will cut down on rasp, keep you somewhat green and keep your back bumper from getting black residue on it.
__________________
~Rob
-DD Air Guide, Stillen G3 CAIs, 63mm Throttle Bodies, Motordyne M370, Berk HFCs, FI TDX CBE (non-res, CF), Sprint booster v3, Ecutek Dyno Tuned, and the list goes on...