In my opinion, the Zortrax Inventure, or m200/m300 with Hepa filters are your best bet. These things print nylon like a charm, I can maybe post a test print photo here in a few days if you want to see.

You can read about these printers here

Zortrax Inventure
Zortrax m200 plus
Zortrax m300 plus
Zortrax 300 dual