Hey there man and congrats on a sweet truck! You're definitely off to a cool start with your mods, too! As for the tuner, from what I've read on here, Diablo seems to be a running favorite with the HEMI guys, but I imagine it's personal preference as to which one has the options/features you want. I know they just released the programmers for the earlier 4th gens but not sure about the 2013's. Don't know if the tuners out now would work or if the 2013's have an encryption on the PCM as there was on the past couple years. Best to check with other 2013 owners here and even our vendors on the site to see what's available for your truck but definitely keep us posted on what you end up going with!
Thanks for the hospitality. I have a 13 quad cab big horn with a 3.92 LSD. Already put a k&n cai and am putting a 14" magnaflow muffler on this week, wool as soon as it comes in the mail. Atuner is gonna be my next purchase i'm hoping anyway, have you any opinions on which? Or even if this should be my next mod