digital display. because im lazy and love them.
but besides that I would second what rocky said. I am glad I do not have to outfit a mill it will cost your left nut. but once you have it it will be nice as hell for projects. I do think a chuck is nice have just incase you need to fit something a funky size. like today i needed to use a hole saw and of course i dont have a hex collet. so I grabed a chuck, through that in a collet and then put my hole saw in the chuck.