Support, Quality and an endless supply of ideas and cad ware are the main things to look for. XYZ Printing has hundreds and thousands of free dowloads for printing.
I have a dA Vinci 1.0 Aio all in one 3D Printer (Scan/Edit/Print) for sale.
The images tell the story. It has had only 14hrs use. This printer will scan an object and print as well.