I have 3 Presidents, a 6020, 25 and 30. The 30 I use jigging with a spoon with 12# mono. It is a bit heavy for crappie and bream I would think. The 6925 is an excellent reel for light line and crappie jigs and spinners and that is how I use mine. I have it on a 10' B&M Crappie Jig Pole and it cast a mile and is very light and well balanced. If 10' is too long for you I would go with a 7 foot in a good balanced graphite model that has a fast tip with enough backbone to handle the occasional cat, bass, or striper that will eat your bait.
The 6920 is and excellent reel also, but it has a few less bearings in it. I can't tell much difference in the 20 and 25 but I suspect the 25 will hold up longer.