Get the ebay CAI, its the same exact as the injen, just not polished. email injen for some stickers and you got an injen intake for a 1/4 of the price.
I got the injen, and believe me, i wish they had that when i was getting an intake.
I had seen in another thread somewhere the soundomain.com was sellin an Injen cai for the msp for $197 shipped. I think I paid $230 shipped for it from adventon.com. Jersy-emt has a whole aftermarket guide. You should check it out if you haven't already.