You want to be careful not to hurry up and buy a drill press that won't be able to handle the bits and accessories with which you will be working. Table size varies according to the model and brand. If you are planning to be drilling into wood you should be prepared to fabricate a table for your standard drill press. Throat depth determines the greatest width that you can drill from the center. The quill stroke length determines the depth of the hole you can make on a pass without adjusting the table.
Many drill presses today come equipped with a light.
Its easier to purchase a press with a light already built into it because then you won't have to rig one up. Finally, if you are planning on using a standard drill press for wood you should be sure it has a collar for clamping a mortising yoke to the drill press. If your drill press doesn't come with this feature you won't be able to use a mortising attachment.