Well, I said I wouldn't recommend any printers, and I won't. But, the Peachy printer deserves a special mention in this book for three reasons. One, it has no stepper motors. Two, it's the only 3D printer I have heard of that actually uses Blender as the printer driver. Three, it uses the Blender files as object files.

It is a vat photo polymerization system. Instead of stepper motors, the laser beam is controlled in the X and Y axes by a sound form generated in Blender that moves two mirrors. The Z axis is controlled by a salt water drip system. The dripping is monitored to tell Blender which Z depth the printer is working on and the salt water is used to float the resin so that the resin rises to surround the part of the object that is being formed at that moment. It should be on the market as of April 2014.