RS*r....APEXi WS....

i'm looking for a catback with minimal exhaust sound at low rpms and a deeper sound at higher.
i can't find any RS*r's around anywhere and since i have a 4th gen SI, and the APEXi WS isnt compatible..now what?!? i want something as close to stock sound as possible. something that i can actually hear my radio when on the highway without blasting it.

can any of you guys esp with an si recommend any?

you should look at getting the Apex N1 N/A catback exhaust, it's only loud when you gun it, plus it comes with a silencer and it really works so than you can't hear anything at all when you gun it.