I am planning to perk up my GS, and know the main things I should do are cold air intake, throttle body spacer, new spark plugs, ignition wires, maybe upgrade my brakes. What are the best brands recommended for these, and are there any other perks I could use that I missed? I thought about a turbo, but don't want to spend the $6K needed to do add'l mods to the rest of my car for appropriate use of turbo. And I don't want another car right now...any suggestions? I'm thinking maybe a total of $2K. Thanks for any input!