I would recommend the Zortrax M200. Look at the stats in 3D Hubs and see the great number of reviews that has been posted. This is an no non sense machine that performs right out of the box. Perfect for prototypes. The filaments are not that expensive for the quality you get and makes up for the failed prints you would spend your cheap filament on with other printers.
Hi, I have not experience with the Zortrax printer nor with the Ultimaker, although I have seen many prints made with them.
But personally, I would suggest to consider the Mankati Fullscale XT-Plus.
My main issue with the Zortrax would be the reliance on factory filament. In my opinion, the quality of prints is very reliant on the quality of the filament used. In that, of course, the Zortrax has an advantage since the company has specifically chosen its material to match its own printer.
The downside of course is a higher price of filament and limited range of materials.
For me, I have just bought my second Mankati Fullscale XT-Plus printer since I needed to extend my production capability.
My first Mankati printer has logged 4100+ hours of printing in just 15 months (average of 9 hours per day, 7 days a week).
Of course, with such a heavy workload , I have had some issues with the printer, but with a printer doing that much work that can only be expected. Especially if you consider the fact that I have printed a wide range of materials, from PLA, ABS, PETG, NGEN, XT, HT, Apollo-X, Nylon, Woodfill, FlexPLA/Flexifill, Glowfill etc.
For the record, I ordered my second Mankati on Monday directly in China and it arrived on Friday. Contact and support has been excellent throughout the year…
One more to consider is the CEL Robox. The build volume is on the small side - 210 mm X by 150 mm Y by 100 mm Z, but the ease of use, both in software and in hardware, makes up for it. I have been using three of them in my Hub and consistently get 5 star reviews for quality. I have run over 30 pounds of materials of various types through the printers with little maintenance and very few print failures. Most print failures I have are a result of the model not being suited for the material the client chooses. This size also lets me print 90% of what my customers are asking for and 95% of my own projects.
The early models had some issues, but recent updates have eliminated them and the printer seems to be a solid contender and probably one of the best on the market for its size and price point.