I have EGT, trans temp, boost and voltage gauges already. And the tune on the truck came with it so I have no clue what kind of tune it is. I will be getting a TW or DP.
As for the K&N, I have heard from lots of people that the K&N sucks, but I have a sleeve on the intake, which restricts water and sand from getting into the air, as for dust, I am in MI, it is rarely dusty here. Other than that why is the K&N bad? It works great for me
Very glad you have the gauges already. Towing with tunes and no gauges is bad mojo imho. Custom tunes are the way to go, and you can't go wrong with the big names. I've been told I should try some others just to find which I like the most, but the PHP tunes are pretty badass. It's my understanding that TW tunes aren't that much different, though there is enough that some prefer one over the other. I want to try his tunes just to figure it for myself.
I actually want to get the PHP Hydra chip just so I can run multiple tuners and figure out which tunes from which tuner I prefer.
All I've ever heard of from K&N is the turbo dusting, but one of the GPDA guys had the sealant internal to the filter come apart and eat up his blades. Could be a one off issue, but it's not something I would chance. That's just me though, as there are plenty of folks that have ran K&N for tens of thousands of miles and never had a problem. There was a K&N on my truck when I bought it, and when I inspected the turbo, it looked fresh and clean. When replacement 6637's can be had for less than $30, I don't see a good risk/reward ratio for me to run the K&N.
Have you done the CCV mod? If not, look into it. Before I did mine, I looking around the intake pre-turbo and saw the oil build up. A little oil was also in the intake of the turbo. Changed around my CCV tube, and the problem is solved.