for a programmer you want H&S. ive never heard of anyone having a problem with them. Edge takes a min to start your truck so it gets rid of DTC's, H&S doesnt. Smarty is good, but ive heard it has been known to put the truck in limp mode. you want a egr delete, S&B intake and 5" pro flo straight pipe. get rid of the DPF. 22mpg with this on 120 tune.