I know how you feel man...we're all looking for the holy grail of sound.
I like the V8 rumble at idle, but I hate having people staring at me during cold starts (Prius or volt owners no doubt)...I hate drone, but I hella dig ear shattering WFO sound as well. But we all there are no free rides...everything has a compromise.
It's the duality of man. Exhaust existentialism.
PS. I really enjoy my M performance exhaust...although, I agree with everyone else...more sound is always good on the top end. Have you listened to the M performance exhaust videos?