Well you got a magna flow and a 2.5 piping, it is going to sound very nice. Knowing how excited you are, and how much you love your car, you're going to go insane!
I prefer the resonator off, but I agree, at the start keep it. Drive around for a while, and if you want it a little louder get it removed. The best thing about this hobby is that it's all about what you prefer.
