Okay okay im sorry, I misunderstood what you were describing. You are correct that those are resonators/mufflers. I would just keep them on, like you said, it will pop, rasp, and slap. I think it sounds too much like a truck. If you were looking for a good tone but a bit louder for virtually free, you could always just dump the exhaust right after the muffler. Its a surprisingly popular route.
Sound waves are very directional. On a standard exhaust, the sound is all projected backwards. By dumping the exhaust, you will allow it to bounce off the pavement and around to the surroundings. Plus you may gain some hp? I dont see why not!