As the stock exhaust isn't bad I'd think most willing to pony up for an aftermarket system are going to want louder.
System I would want: Has easily removable mufflers and resonators. This would allow driveway swapping of components in order to achieve whatever the owner likes. Optional straight pipes and different types of mufflers could be installed as desired. The ability to mount the exhaust valves as the factory system does and the option of mounting them on an external mount (keeping them plugged in but not functioning so as to avoid codes.) The ultimate user configurable system that could go from stupid loud to don't wake the neighbors. As your taste change so can the system. Worried about buying a system that will drone or end up being irritatingly loud? No problem, you can change it with minimal effort and expense.
Side note, why doesn't Dodge give us the ability to select the exhaust valve to open or closed in any mode!