[BatMobileLT1]

I definitely agree that getting the NPP Dual Mode Exhaust is must have and best bang for the buck option as mentioned by several responses.
First, I think its almost worth it for the awesome looks of the quad tips alone.
Then you get more aggressive sound, and the ability to on the fly drop it down from Sport to Tour, or even to Stealth mode (I also use this rarely but nice to have when you want it).
And I think it also helps resale value as I know NPP option was one of the first options I checked for on any new or used Camaro's I was looking at.

I think the only reason not to get it (as just mentioned above), is if you want to save $1k to put it to a custom exhaust that you know you want.