If you will be pulling a lot of weight,Id wait for the six speed,the tighter ratios,and stronger engine are the cats meow for towing,however if most of your runnning is empty,and you like to accelerate quick without shifting a lot of times,then the 5 speed will do you just fine. Mod wise,if warranty is a concern,go with an EZ,and a set of stage 2 or 3 injectors,you will have tons of power,maybe to much for the clutch. (go southbend)If warranty isnt a concern,go with the Edge comp,and injectors if you need more power after that. Form my experiences in buying vehicles,I always regret later buying a truck that isnt equipped the way I wanted it,because it was there,or I saved a grand,your laying down 35 big ones,if you want the six speed,wahts a nother grand at that point?Gety what you want,these trucks arent rare anymore,you can find the truck you want 99% of the time on the net or locally. Good luck.