If you're on the fence about which Trifecta tune to get, the beauty of the budget tune is that you can upgrade to full later only paying the added cost, not have to buy the whole thing over again.
The main difference between full and budget version is that the full tune lets you data log the vehicle and have Trifecta tinker around with your tune to fit it to your mods and any other idiosyncracies of your car (they all come a little different from the factory). The budget tune is a generic canned version which works pretty decently and is at any rate a big improvement over the stock tune, which is deliberately designed to limit your car to its worst performance.
Neither Injen, ZZP, or DDM are really Cold Air intakes, they all give your car warmer air than the Stock Air Box; the SAB draws air thru a snorkel out of the fender while the aftermarket intakes draw out of the engine compartment. Injen however draws from closer to the engine and then runs the tubing Over the engine, heating it still further. ZZP draws and delivers colder air than Injen, and DDM has a heat shield which delivers still colder air, probably the best bet on the market now. All three deliver more volume of air, or require less work from the engine to draw air, depending on how you want to look at it, however tests indicate that Injen actually costs you power, perhaps due to how much air warming it does. This might, on the other hand, increase your MPG, both theory and some data support that.
