Stonypred8 said:
a nice deep sound. I don't want it overly loud or obnoxious.
I would personally recommend the oldie but goodie RS*R exhaust.
I LOVE that exhaust. If you can find one, I'd definately say its worth it.
Its not loud at all. Slightly louder than stock at idle. And it has a nice deep growl but doesn't drone either. Its a very subtle exhaust.
People usually can't tell I have an exhaust on until I punch it and fly past them.

And its not one of those that make the whole cabin in your car rumble either.
Passengers in my car usually don't notice that I have an exhaust on under normal driving conditions.
(Or at least no one has complained about it!)
You don't have to worry about getting pulled over by cops with this exhaust. It does NOT attract that much attention.
(Which is a good thing in most cases.)