SCT seems to be the best for the 6.0, Find a good custom Tuner, such as, Spartan, Elite, Innovative, and others, they can all write you a tune specific for your truck and your mods, that you'll be very happy with.
The SCT Livewire, has built in guages, the X3, X2 and others do not. You NEED guages of some sort if you're running a programmer.
You really don't need a new airfilter, your OEM setup flows plenty of air for up to 500HP, but if you end up getting one, the AFE stage 2 PG7, seems to be the best.