Monday's cat-b exhaust purchase...

Alright, I have managed to scrape up around 500 for a cat back exhaust setup for my car. The current one on my car is too old and very abused (due to the fact that my car is dropped). The resinator on it is shot to hell. Anyway, I am going to make the purchase on Monday and I want some advice, what to go for? This is going on Teg GSR 95. I really dont want something abnoxiously loud, but I do want a decent power gain. What do you think?