I'm running the Predator currently. Getting a PPE from a friend for free then if I dont like it I'll buy the Smarty from another friend of mine.. I like the Predator since its simple only 3 level to choose from. Same with PPE but the Smarty scares me alittle. There's just so many options and I just prefer the less options the better for me screwing something up...I have an early 04, all I'm running is the Predator Power Puck (D7156 for the 03 model year).