I have been comparing the many cold air intakes out there, such as K & N, Airaid, MOPAR, etc.

For the quality and price, I will be buying a C & L for $249. It has the highest rate of air flow, a one-piece stainless steel intake, and a 3-sided box with a rubber seal where it meets the underside of the hood. See:

http://www.cnlperformance.com/hemi.html