There are lots of good jigs on the market. In the most recent Crappie World mag, there are a couple of articles about jig fishing, and all the guys are using different jigs. IMO, depth and speed are far more important than the jig I've got tied on.
Having said that, the best thing you can do is go to the KY board and read. Maybe you can hook up with another fisherman who can show you the ropes. Time on the water with an experienced crappie fisherman will help more than any jig.