Vehicles made in the last 5 or 8 years typically don't benefit much in the way of a cold air intake. If you are wanting for power, and don't care about a warranty, tuning is the better way to go. Intake and exhaust restrictions aren't nearly an issue as it were for cars made before the mid 2000's.
Really, exhaust and intake in most modern vehicles benefit in the single digit horsepower range, maybe very low double digit. Most people do it to have a different engine noise.