K&N = simple, works, and you don't have to take anything out that you'll regret losing. As far as short ram intakes, Weapon R isn't a bad brand at all, they've been around for a while and do their job.
You'll spend a lot more money than you would by getting a K&N from an auto parts store for around $44 though, it'll give you horsepower and save you money in the long run when you won't need to replace the filter for the life of the vehicle.