I think that they all have their pro and cons. I use different tunes for different track layouts. If a track is relatively short and tight, I prefer the Strat tune with the more aggressive throttle map (really good bottom and mid power, falls off on the top end). If a track is more open, I prefer the Dizzy tune (better top end and linear throttle). The JST is like a compromise of these two. More aggressive throttle than Dizzy but not as much as the Strat but it does build boost a tad quicker than the Dizzy, but falls off on the top....by a hair. Overall, if I had to choose one, I would choose Dizzy. His base map had less ignition corrections than the JST right from the beginning (JST and Dizzy are custom tunes, Strat is a canned tune), hold boost a little better, and his customer service is awesome. JST's customer service is awesome as well, but you cant a totally talk to him on the phone, Dizzy, you can call him up and ask questions, plus he completed the tuning alot quicker.
If your looking for a canned tune, then any of those 3 will work.
Hope this helps.