One other thing to point out. I just realized that my original post somehow had text cut out (my first post). It was supposed to mention that we would love to get away with spending only ~$800-1200 per employee but would not mind spending more for productivity gains.
That's not a bad idea. Every employee is different. Just don't assume that two monitors make everyone productive. Find out what each persons' needs are and assess accordingly. Some may need more than others and some may not need anything.
