I have done several mod's and in my opinion the order to do them would be:
1) Mid Perch
2) 5 Star Tune - if for no other reason than to change the shifting patterns. MUCH smoother shifting at better speeds and gets rid of the "anchor" feeling when you let off the gas.
3) Bumpers - the stock bumpers suck. Sorry, no better way to put it.
4) Depending on how much you off road, this one may need to be moved up to 2 or 3, RPG Stage 3 with National Springs.
5) This is the #1 appearance mod to do, Raptor Retrofit aka Ducati front headlights!
Interesting thread as I'm kinda in the same boat with my 2012. Have Duc's heads, and just bought a 5 star tune, AFE CAI, and weathertech floormats for the front from another member. Just installed the CAI and tuned to 89 performance today. I've got a short antenna to put on, but I can't get the MF'ing stock antenna off. It just sits there and spins when I try to unscrew it. I've got just about all the paint off the base now though
I'd like to change the front bumper, but unfortunately i'm not into the prerunnerish look most aftermarkets offer. Outlaw's Alpha 1 Artillary bumber looks good though. Either that or I'll break down and get the ADD Rancher with the grill guard to protect against deer. I'd like to beef up the suspension for towing a bit with some RPG 4" bumpstops and maybe a stage 3 and mid perch. Would a sway bar delete benefit me if I'm mostly seeing highway miles? One other thing I'm thinking about are some lighter rims/tires, as my truck won't see much offroad use other than gravel roads. Oh yeah and a cutout for the exhaust. Double oh yeah and aftermarket exhaust.
Just went for a spin and wow, driving feels totally different with the tune. Way more responsive.