If you go tuner I'd go Cat6 because it has the throttle controller. If you don't go tuner, I'd get the Roar Pedal throttle controller.
Wouldn't bother with the intake, zero gains and from what I've heard- not much of a noticeable sound increase. I don't have experience personally though.
I can't stress throttle controller enough. Makes the truck feel like an entire different animal. There's a bunch of us running the Roar and as far as I know everyone loves it. I drove without it on one day (after having it on for while) and it felt like torture lol.
The only mods I have are an exhaust and throttle controller, but in combination they've completely transformed the truck.
A bunch of other people can chime in about tuners, and there's also big threads specific to both the Cat6 and Jb4 that are worth a read. There's talks about a Mopar tuner coming out but that's a
lonngggg story
EDIT:
A battery powered jump starter, lol