I've deleted the rear cats and "H" pipe and replaced them with an "X" pipe. Resonator remains in place and acts as the muffler since my muffler is also deleted. Resonator provides enough back pressure to be effective, yet allows more flow then the muffler. And NO DRONE, even without a muffler. Sound is very civilized until WOT, then she wails out the back, kinda like an uncorked Austin. The looks I get when I punch it next to some ricer who's revving away at the light is priceless.
You need an "X" pipe to eliminate the drone, and they are relatively cheap pricewise.
Here's the one I used... I went with the 2.25 in. SS model for under $40.

Results for X-Pipes