I've been wanting to build a CNC machine for a while, but have gotten distracted by various other things. I finally did a minimal amount of research and bought some stepper motors and a controller. I honestly jumped into this pretty quick, though, and didn't spend a lot of time researching what I was buying. I'll update this as I learn more about what I bought and, if necessary, what I should have bought instead.
I started with the controller:
[File:2016-04-20 18 40 48-Ramps 1 4 RepRap 3D Printer Controller Mega 2560 R3 A4988 Drivers LCD eBay.png]