My friend has a true RF machine, made in Taiwan. There is no question, it is a few notches above the machines made in China proper. The fit and finish is very nice. I have inspected the pictures of the 833t very closely and it looks very comparable to his RF machine, including the scraped ways. The "Main High Quality Features" section of the 833t page is pretty much a list of reasons that I wish I had it.
When I got into this, it was because I switched jobs when I just started seriously learning CNC. I decided that it was a skill that I wanted to have, so I considered getting a manual machine and converting it, but in the end decided I was less interested in the conversion and more interested in the machining. However now, I wish I would had got a manual machine and CNCed it myself... Considering how much I have already changed my on 940 and how much more I plan to change, it would have made more sense to start with a manual machine for sure. Live and learn...
Don't get me wrong, the 940 is a killer machine, the travel cannot be matched which is the reason I bought it. With only changing the controller and tuning I've been able to hold ±0.002" with out really trying and I can do better than that if I take my time. Bang for buck, it's tough to beat.
PZ