i want a wood milling machine. because wood cases are awesome as !@#%.
maybe i will mount a router upside down to a table... a little dangerous but way cheaper.
also a cnc milling machine would be nice for making plates and a 3d printer for random keycaps and prototyping things. -> $$$
A router table is nice, really nice. But it also limits what you can do with it. My friend has a router table and a couple hand held routers and it's really nice to have both. I think his table is 3hp router, a handle held plunge 1-3/4hp and a 1 or 3/4 hp pony router for small stuff.
You should be able to make a case will a router. A CNC router would be easier, but it could be done with a hand held.
A CNC mill would be nice, but expensive. A CNC router is much cheaper, but it can't handle metals that well (Depends on the motor used and how the frame/machine is built).
Also, 3D printers are nice, but most don't have the resolution to make really nice looking caps or a table big enough to prototype cases unless your dropping a large sum of money for one.