it largely depends on a couple of factors.
1. water clarity
2. water depth.
1. if the water is stained, you will want to use real bright colors - yellow, chartreuse, or silver (my fav. choice). If it is clear water, you'll need more natural colors.
2. depth, deeper water means deeper diving cranks, & the bandit 100,200,300 are all excellent choices. I don't think the crappie are real deep right now, so the 200 would be a good starting point. you can also vary the depth by how much line you put out. the main thing to try is outside bends of channels, & deep water that is close to flats, points, etc.