For jet kits, you've got about three choices: K&N, DynoJet, or Factory Pro. Most people recommend Factory Pro as there isn't a need to plug air jets or drill the slides.
Still going through the process myself, I can say that it's not about getting a 'good' jet kit, but simply (heh, or not so simply in my case) jetting it correctly with the right combination of main jet size, pilot jet size, needle height, float level and mixture screw settings.
The Factory Pro stage 1 kit costs about $129 at most places, and all it comes with is longer slide springs, new emulsion tubes, two sets of main jets (one size larger and one size smaller than stock) and needle shims. The instruction sheet that comes with it basically tells you to use all your stock parts, and only make changes as required. It also claims 0 HP gains.
If you're looking to do the work yourself so you can learn, be prepared to tear into the carbs at least a few times to get them right. With the exception of the emulsion tubes, you could buy the main jets and shims for alot less than the jet kit, but you'd need to know pretty well what sizes you need. If you turned out to be wrong, then you're stuck buying another set. And unless you've got access to a dyno, it's going to take several tries to get it all right.
If you know of a respectable shop or are friendly with your local dealer, you could just pay them a fee and not have to worry about it. Plus then you can take it back to them when it's not right the first time.