Please use the search button! There is no "BEST" chip!!! What is awesome for one person is garbage to another. I will tell you the most popular is DP and TW, I have DP and it works for me. There is a huge difference between a generic tune and tunes from these two gentleman!!! Before you add any more ponies you need to do the supporting mods, gauges, intake, free flow exhaust, I would support the auto trans with a tuned VB as well.
There are no promises though, if you play sometimes you got to pay!!! You can see my mods in my sig. I know for a fact my truck works less to do the same job then it did in stock mode, this should equate to longer component life, but as I said there are no promises!! If you have 300K+ on a stock trans you are on borrowed time anyway!!