All of them are as good as the tech using them. Pick the best guy in your area and buy the tuner he prefers.
As far as the ThunderMax goes, it has come a looooonnngg way since you last used one. I was never a fan of it myself but I have installed a few this past year with amazing results. For someone who doesn't have a good Dyno guy in their area the TMax is a great option. It's just personal preference between it and the PV in my opinion.
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