Since I already have the CNC mill (G0704) in the shop, the next logical choice was a 3D printer. I wanted something relatively affordable yet capable. I went with a MendelMax 1.5 Deluxe kit from 3D Factory LLC.
My free time is limited but I felt the value of having built it from scratch was worth the extra time vs. buying assembled.
I am already well versed in Arduino and CNC in general so I feel I am at an advantage to most, time will tell!