What are you planning to do to the car? If you are looking for a simple mod, just get a Short Ram Intake (SRI), I've had issues in the past with a CAI and wouldn't recommend it unless you plan on doing some serious tuning, the prices difference is just not worth it in my opinion. Plus if it rains a lot where you live, you run the risk of the CAI turning into a straw that will kill your engine.
For all else, reference the link above. Also realize that probably hundreds of people have asked your exact question before so trying searching online before you make a new thread.
Just some things to think about.
- Aaron