I would 100% go with an SCT with a tow tune from Eric, I have one myself and I don't even tow anything... the transmission tuning alone is totally worth it. Banks is overpriced no matter what deal you're getting on it, because even if it was the same money, you still wont get the performance you do from a custom tuned SCT. If I was in your shoes...
I'd get the SCT with custom tunes
turbo back exhaust
then buy a set of ARP studs and put them on the shelf for insurance. If you are mechanically inclined and feel like yanking the cab off the truck, then just put them in...