For the money i would buy the Steel Prusa. Its cheaper than the Original Prusa and build with quality elements/ the electronics/ . It has unsupported rails, whats typical for cheaper printers, but is not like some funny rollers, rolling on aluminum profile. I dont know of something really better, from an educated point of view. Yeah, many will say this and that, but from CNC point of view, i see that as the best cheap printer around