Have you done exhaust yet Dave? CAI, exhaust and throttle body would be good sensible upgrades. If you havent done exhaust youll want to if you go with the larger throttle body in order for the car to be able to use it to its best advantage. Not sure you will need to go quite that large though unless you are planning a cam upgrade though. PM Andre if you want to pick the brain of someone who has already studied and understands the caveats of how well the different mods might work together. I am sure he would be happy to give you some insight... and sure he doesnt mind me putting words in his mouth either...