I have purchased a print sample from Zortrax reseller, I have to say that it is really a good choice for high resolution printing!
But I did not buy it because of cost performance...

Here I recommend two printers for reference: UP! MINI and Mankati Fullscale XT Plus,
I have used UP! MINI for 1 year and Mankati Fullscale XT Plus for 5 months!

Actually UP! Plus 2 was my first choice at that time, but it was such a small printer with such a small build volume at a such high price!
So I choosed its simplified version, UP! MINI... 599 USD price makes it not a hard decision for me!
It came with a poor inner structure, that really worried me, the metal sheet is very thin and cut edge is rough...
But when it started print, I have to say, the print quality and stability satisfied me!
It is small on the desk, and always gives fine results!
Below are my experience about UP! MINI:
Good:
1. Low price at 599 USD.
2. Easy to use, easy to maintain, extruder is really easy to take apart.
3. High print success rate due to small volume.
4. Enclosed printer body.
Bad:
1. Not open source software, few parameters available for setting, cannot use 3rd party filament.
2. Print with only ABS, PLA filament is not provided by the manufacture.
3. Too many 3D printed parts in the printer...
4. Not so easy to remove the object, especially small and thin objects.

After several months printing with UP! MINI, I found the small build volume was a quite big problem to me, I cannot print some big parts.
Cut the object into pieces and splice them together is bad idea for smooth surface requirement...
I found Mankati Fullscale XT in 3D Hubs 3D printer guide, big enough, and vaule 9.2.
But in their online store, it was a upgraded model called Fullscale XT Plus.
It was a 1,499 USD printer, but I cannot find much comments about this brand and their product, it stucked me for almost 2 weeks...
When I received the printer, I was impressed about the solid printer frame and those quality CNC parts, but sadly the build glass was broken in transit...
Afte 4 days waiting I recevied the new glass from Mankati, and I spent a whole day to adapt to new printer structure and software, that was not a good exprience...
Luckily they provide detailed user manual, and online skype support also helped me a lot, the first run turned out that it is a great printer! Really high printing resolution and fine details!
Here are my opinion of Mankati Fullscale XT Plus：
Good:
1. High cost performance: one-piece full steel enclosed frame, 260*260*300 mm, dual E3D V6 extruders, 1499 USD !
2. Great filament compatibility due to the 300 ℃ hot ends.
3. High resolution performance.
4. Universal hot end mount, open source marlin firmware and Cura software.
5. Successful long time print over 50 hours !
Bad:
1. Bed calibration is a challenge for green hands.
2. Not a very quiet printer.
3. Need regular lubrication for XY rails.
4. Fan cover is not very solid and might crash the object.


Hope it's useful to you.