I suggest you get a CAI kit with a tuner. You will get more power from the combo, and the tune will tighten up the shifts in the auto. Just the shifts alone should get you pulling to 60 quicker, and more power is always fun and quicker still.
If you ever have to take the car to the dealer for repair, just reflash the stock tune, install the stock induction and disconnect the battery for more than 30 minutes. They will see that the PCM has been reset, and if they ask, say you disconnected the battery to see if that resolved the problem. They shouldn't give you grief about that.
By the way, how are you timing your 0-60 so accurately?