Just to have a bit of fun ... you should spend way too much money on your first set of dies because that is what the rest of us did. Think of it as a rite of passage. Most of us are too embarrassed to admit how much we spent on gear only to discover that we didn't need it - the magic is in the training.
The theory behind micrometer dies is to make changes precisely. But if you have a good load - powder charge, shoulder bump, neck tension, and seating depth - you only change it rarely and not by much. Most of us now have good dies that are locked in position. Because we have good settings and good technique, good dies get it done. When you are getting started, you don't know how to use the fancy gear - the limiting factor is you. Good but not top-of-the-line gear, used carefully learn as you go, can make you into a consistent half-MOA shooter. When you get there and you are drooling for a really pretty micrometer seater well then have at it. But I bet it won't take a tenth of your groups.
