Well i have and 08 Si and I'm looking to make my next mod. What i currently have done to the car is: tints, CF hood, HiD's, and fog lights. Im thinking of going with ether exhaust or suspension next, but i feel like im leaning toward the suspension. Any how I'm thinking of throwing some koni yellows on it but i dont really know what springs would go best for that set up. As far as exhaust goes i hear a lot of different opinions when it comes to exhaust, but i was thinking invidia or full race it would be catback. Also as far as software goes how much does it normally run cause i would believe i would get the biggest gain from that, but im not trying to break the bank