There is nothing bad with staying with a NA. Consider putting on dual RL dual exhaust - at least your car will sound cool. (more cool)
Does it? I have a RL and have always thought that this car didn't really sound all that great. The only redeeming factor is the sound of the turbo--but every other sound from under the hood just makes it sound broken, and the exhaust, eh. Thankfully the nice handling and the performance more than make up for the sound.
The dual exhaust does look better, though.