Tuners are OK if you're not looking for monster power. It really depends on what you're goal is. Superchips tuners are not worth the money when you can get a Evolution or Diablo for the same money.
I had an Evo for my Stroke and liked it. Easy to read, fast upload time, good power, and spells out the trouble codes and lets you clear them when you get them. Diablo is supposed to be good too. Only reason I went with the tuner is because I wanted the code reader too. If that's not real important or you're wanting more aggressive tuning go with a box like the Edge EZ or Comp.