I went with catless Gruppe-S Uel, HKS dual resonated front pipe, HKS legamax premium. Its quiet when cruising but a soon as you hit it roars. Not too bassy not too raspy tinny somewhere right in the middle. But plenty loud when you romp on it.
And I like the 5" fill the bumper nicely
This isn't my sound clip but very close to my sound. Only difference is he has a catted front pipe, I have the dual resonated.
[ame="https://www.youtube.com/watch?v=NtwDtv__V-w"]Subaru BRZ with HKS Legamax Premium catback and Tomei UEL headers - YouTube[/ame]