Well, I'm on the fence as to which mod to do first. I figure the AEM will be the most bang for the buck according to the dyno numbers at $250, but I have a wierd logic. Since it's Christmas time, I'll have more money than usual, like $450 or so to spend. Which would only happen now. That is hard for me to come up with anytime anymore. If I bought the AEM, I'd have enough left to get the Infinity Ref speakers I've been contemplating as well. I've heard the DP is a pita, but I've done quite a bit of pita work on other cars, like longtube headers on a LS1 Z28. Thanks!!