[DampRobot]

I'd agree with Adam, if you're interested in making stuff that's more versatile, go with a router.

At least at this point in their development, most 3D printing systems don't produce parts that are very strong at all. Sure, they do require little human input once they're running, but they're slow and I would not trust any of their parts structurally. If you like making little plastic parts to show concepts or as models or something, go with a 3D printer. Otherwise, a router is the way to go. In my experience, you can make basically everything you'll need for macro scale personal projects and for FRC on a 2.5 axis CNC machine like a router.

Lots of people are making a huge deal out of the "3D printing revolution," but the truth of the matter is 3D printers are only good for very small run, complex, non structural plastic parts, like trial electronics cases or miniature sculptures. There will be no real manufacturing revolution (as some reporters and politicians are hoping for) unless 3D printers start printing much more durable materials, become much much faster, or become able to print electronics as well as plastic materials. For the moment though, I'd prefer using a subtractive CNC tool (like a router) any day of the week.