Good list to start with.
35's will fit...stock. So no worries there
Intake...go with an AFE (IMO) good price with good results
Tuner, go with an Adrenaline and Edge. They monitor anything you need and real easy to install.
Just remember, these trucks are amazing and strong. But you start adding horsepower you need to save up for stronger stuff. Keep your tuner on low and you should be ok, but if you turn it up you might want to start looking for a built transmission.
Keep up on your maintenance, repairs on a cummins aren't cheap. Spend the money on good quality fuel filters so your not replacing injectors anytime soon. Monitor your oil level, if you have a leaking injector, the fuel can get into your oil and ruin your engine. If your oil level goes up, and you didn't add any oil...you got a problem. lol
Welcome to the dark side...you'll love it. These trucks are addicting. Feel free to PM me with any questions.