So does the muffler actually get quiter as you accelerate to the higher RPM's?? I'd like something that has kind of a nice bite of growl to it if I floor the vehicle and rev it to redline, not soemthing that gets smoother. I don't have a intake, I might get one, but they're pretty much pointless so I might just save my money.
And what exactly do you mean by rumble at idle?? You can hear my other car idiling a few cars away from it at a stoplight with the windows up. Thats what I call a "rumble" at idle

Although I don't expect the Cruiser to do anything like that.
Is there any way you can post a soundclip of you Cruiser??