One thing to think about >>
If you buy the hypertech.... you plug it in, press "go", and in five minutes you have a reprogrammed car with a tune that was developed using a dyno that will hopefully improve your performance somewhat.
If you buy LT-1 Edit (which is an excellent software package, I use it myself), you get it, then open your file.... and start experimenting by adjusting it, downloading it, running and logging, trying to decipher the logging file, then tuning it again.... and the cycle keeps repeating while you're just hoping that you're actually improving performance rather than hurting it unless you have a dyno to test it on.
What I am trying to say is that unless you want to get really intimate with your PCM and spend a heck of a lot of time tuning, testing, then retuning...just buy the Hypertech and be done with it.
If you have a lot of major engine mods (like cam/heads/etc...), then you probably need LT-1 Edit because Hypertech's programming is for a basically stock vehicle.
If your car is basically stock and you don't plan on tearing the engine down, then stay with Hypertech or one of the other pre-packaged tuning products.
Actually, if you car is completely stock with no mods except an air filter or air foil and a catback, then I wouldn't waste my money on any aftermarket tuning aid because GM did a pretty good job for what the car was supposed to be.
-Dave C. '97 Z28