Originally Posted by TheGreatOne

I think so

I went 18" Res with CF cans as you get a bit more sound through them than the SS and 18", so I figured, happy medium (was concerned about cabin noise) but now I feel I could have maybe went 12" but still very happy

Sound is great, If you got 12" non resonated I think you'll get the sound you want. How concerned are you with the cabin noise? Also with SRM your car will sound so much meaner though, what you're looking for...night and day