Just looking for some recommendations for an exhaust system for a BA XR6

I'm looking to have a system that gives a little bit of noise on light acceleration, but sounds the goods when you mash the right foot, without droning. Targetted toward low end performance.

On my EL i had pacemaker 4480s, a lukey 2.5" and a single straight-through muffler - although it sounded nice when i opened it up, it droned too much when i was cruising.

I know it's not an exact science, but any suggestions/previous experiences etc would be appreciated.