X3, I know there are others who do great work with their tunes but I can only speak from my personal experience. I absolutely love my DP tunes, it's like a whole new truck, and their customer service is great. I recently had a small issue with my switcher, purely cosmetic and all my own doing, I e-mailed Diane and she took care of me right away, no questions asked and no charge, not even shipping. As for gauges, I love my ISSPRO's and you won't find a better deal or a better guy to deal with than Clay at RiffRaff.