You can check out different sounds on youtube. I like all of them, but you can choose what you ant on your car. Headers make a real differencem also. Look up some different setups on there and hopefully that will help your decision.
Just check out the vendor section for prices and youtube for the sound. I have the Ark Ti N-II and every 900+ dollars I spent on it was worth it. I just can't wait until I get the headers installed. They make the catback sound even better, so when the funds roll in, shop around for those as well and you won't regret it.
I love the sound of mine inside and out, but I also love the sound of the ARK. It is up to you to make your car the way you want it to sound. Be creative and maybe people will be saying that they want that setup in their car.