Need a new ehaust system.

[Boyfaceddog]

Hello, I need some advice on a new exhaust system for a 1999 Toyota Corolla. I recently bought the car and luckily almost everything on the car is in good shape, very little rust anywhere on the body or undercarriage but the exhaust is not in good shape with a lot of rust and a couple small holes. I need some advice from people that actually know stuff about cars I.E. not me. I would like to replace the exhaust system and need help on what to buy. I want something in the 150-300 dollar range that will open the exhaust up a little more than the stock system it had, but nothing that will make it overly loud. Also I would not want to have to do any modification to the car to add the new exhaust. So any advice at all would be very much appreciated.