WEll, the best is up to what you are looking for.
If you want the most bang for the buck, my uncle has a truck like yours, and he has the Edge Juice with Attitude. He lives in the area of Lewiston, ID. He loves the power and the fact it is switch on the fly, and also, he can get upwards of 25 to 28mpg on the level 3 setting on the flats out there on the highway. When he tows, he has ample power on the tow tune and it is very smooth power band.
I dont know much about an others, but for the money, it is hard to beat Edge.