Geez, if you have to cover your whole car in sound deadener then I would say leave your stock exhaust as is. Why bother making it loud??
If you get a drone at 1800-2200 RPM with an automatic - just change the RPM by downshifting, accelerating or whatever.

 

I have the FLowmasters and the drone is there with them as well. With an auto I hear it most around 1500-2000 RPM at any speed. At first it took me awhile to get used to. If I what to eliminate then I drop to 3rd or disable the overdrive. The rpms rise and the sound changes to "Don't mess with me".

 

Exactly

Full Stainless Bassini offroad system w/o cats on the Automatic 05 makes less drone and the rpm range gets tighter at which it happens. Between 1500 and 1800. Applying a light throttle thru this range almost eliminates it and then she begins to purr like an old big block motor. A deep throated rumble that is not too hard to take.

Cats off seems to make the drone almost dissappear.