I run an Injen intake with the CAI extension. basically it is a 2 piece intake system and can be run as either a CAI or a shortram intake at your discretion.

Another thing to look at is a drop in filter with your stock airbox drilled out to allow more flow. Does basically the same thing for a lot less money but it doesn't get you the instant rcognition a shiny blinging piece of aluminum pipe will.

Its all in your personal taste and whether you want function or form.