Well with going after the looks side, if you go with the tuner look with a silver or black wheel and not chrome you'll come out cheaper. You can hit ebay or craigslist .org for parts and come out cheaper than the custom shops. Going with the looks of your ride far as tinting the windows, a bodykit, hood, rear spoiler, drop springs..... you can give your ride a more agressive look and not kill the bank. Far as the performance end, most of the folks on here can tell you that go fast parts are not cheap. Especially engine swaps and turbo setups. You have a good platform to start from though, they make everything for your car.