Where to start
There is no need in buying extra gauges at an extra cost. I have the H and S Mini Maxx tuner, and just love it. It will display and 4 gauges you want on the home screen, fuel pressure, boost, trans temp, coolant temp, horsepower, torque, pyrometer, RPM, speed, TC Lockup, Tire Pressure, speedometer adjustments, tire size, just to name a few. Do your research, go to their website and see. The power settings can be adjusted on the fly with the push of a button. I know for a fact if you buy the H and S you will never need another. It will be compatible with any modifications you add to you truck in the future. They have a great customer service department, the guys there will assist you in whatever you need. Dont buy thru them, can find it cheaper if you shop around. But it didnt matter they are very professional, and always willing to help no matter how long it takes.
I have an H and S and completely love it. It is also interenet upgradeable, so anytime they make a change you just download the newest version from their website for free. They even throw in the cable and the sandisk card/adaptor when you buy it. Like I said, you would never need another one. The gauge pod that you can buy is awesome, it comes in black, but I painted mine to match the interior of the truck before installing. Installation takes about 20 minutes depending on how particulate you are on running your cables. My cables are all hid, very clean install, and it took me about 20-30 minutes.
Good luck, I hope this helps you in making a decision.