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Location: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)
Posts: 16,182
RE: Best CAI
OMG, if I had a nickel for every time I answered this question...
For under $350, you CAN get a CAI but it won't do much for you. Even the ones advertised as to not need a tune have been known to throw a CEL.
All of the CAI's are pretty much equivalent in performance. The recommendations you'll get here are to save your money until you can afford a CAI & tune combo, then pick a good tuner (Brenspeed, Bama, VMP, etc.).