um I dont think dual is ricey myself. Ok I dont think you would see big gains from it.But I think it would look nice.
But if you look under the car the spare tire weld is in the way of adding the second muffler. If you look at my site you will see what i did to get mine ready for dual exhaust.I dont say that you have to do all that. But you would have to loose some of the weld in order to get the muffler to fit or just beat the weld in alittle. The reason I cut mine completely out is I was after other Ideas.But I would think dual exhaust would be nice to have as their are very few other that have it.

 

I'm still running stock exhaust, but in general, straight through mufflers are typically much louder. Baffled mufflers full of tubes, reflector plates, and fiberglass packing are quieter. The larger the muffler the quieter it is (more packing). Get a resonator or you will get that RPM-specific droning.

I'm older now, so I'm all about the "quiet" at anything under 2500 RPM these days.

Dual exhausts are only "rice" if done on a 4 cylinder car and anything with two banks of pistons could use it IMHO. Like many 3rd genners I looked at the possibility and then decided that it would either look strange or require eliminating the spare tire well.