Oh...that would explain that burning sensation I feel sometimes!
OP, you know, you didn't say, but what exhaust do you have now? You said your wife hates the drone...so I assume you already have something you don't like or that you and your wife have just been listening to exhausts together and trying to find one you both like the sound of.
Before it's too late...tell your wife that the drone you prefer to hear is hers, and that you think you should stay stock...so you can hear her better at any speed.
I'm so depressed. No one wants to come see me. :(
Mangofy your E46!