Right now, there really isn't much out in the space yet. The Infill G4 is available today, while several other units including this Azentek sit on the edge of release, with no actual firm date. So it really comes down to how long you want to wait, and what features you really want.

For me, I have very few complaints against the Infill G4 hardware, but feel the software solutions out there need a lot of work.