i just had a ppe hot+2 tuner, (ats e-power programmer, same thing different name pretty much) and i took it out and had a friend load a hot efi tune...night and day difference. it's amazing what a big difference proper tuning can make. i am plannning to get efi with in the next few months. even if you're not aiming for 800hp, efi can build you better towing or economy tunes than a ppe could. i'm hooked, if it was me spend the extra and get it done with, because if you were to modify your truck you can modify your tune. i'd get efi imo