I was going to suggest the Lulzbot as well, didn't think about the Ultimaker. Another option might be a Rostock Max or Orion delta printer from SeeMeCNC.
However, I am not sure the desktop industry has progressed to the point of simple prototyping. The PrintrBot Metal is actually on my list of first time printers. So if you are not getting the results you want with it, I don't think any of the alternatives would prove any better. For instance, Lulzbot should work out of the box, but I saw someone have issues printing InMoov parts on their forums.