Hey Dan, any saw that has a lifting top arm is a top feeder, although you can still bottom feed if you want. If the saw does not have a lifting top arm, you can only bottom feed. The saws that are top feeding friendly are the DeWalt 788, the Excalibur EX 21 and EX 16, the Delta cloanes and I believe the Buston Hawks. Although the new Jet has a lifting top arm, the clamps do not allow you to top feed.