We are about to purchase a new Haas EC-400 horizontal mill. This will be our first horizontal machine. I am interested in what other shops think of the options they have or wish they had bought. Which ones are a waste of money? Which ones can't you do without? We are a manufacturer of prosthetic components and medical devices, and currently have a number of vertical machining centers and CNC lathes, so we are not new to CNC, just to horizontal machines.