So you said nothing negative about the one Doosan you have already...only the Haas's. So are these parts to complicated to look at a Doosan 5axis? More same brand machines= better tech support.
The Doosan machine has been pretty solid. We have replaced one spindle in in (mostly our fault). The replacement spindle cost $50,000 and cost us 5 days of down time while they did the work. However they didn't put the high pressure coolant line back in the right place, so after two weeks of rubbing against a sharp sheet metal edge, it ruptured and made a big mess. Replacing that part cost us another 4 days of down time mostly going back and forth with the service techs as they tried to find the replacement part. I eventually got tired of that routine, pulled the hose out (pulling a fishing wire through with it) and took it to a tractor dealership to get a replacement made and installed it.
There have been a few other minor issues that we have been mostly able to work around/resolve but just enough little quirks that I don't fancy the idea of dealing with the break-in process for another one. Examples include: the tool setter is a on a swing arm and that solenoid burned out, the track of the side door that we use to load through while running lights out has to be religiously cleaned on a daily basis to avoid jamming, I can't check tool length of the my face mill on the tool setter without chipping the inserts (we and the techs have tried everything we can think of to change this, but we can't change the spindle speed when it checks and that seems to be the main difference between that machine and the Haas where we are successful with the same process).
We also really dislike the Fanuc control. Uploading programs over the network is a pain; integrating our robot was not simple; figuring out how to engrave serial sequential serial numbers has continued to elude us, engraving part measurements after probing was a difficult ordeal.
Its great now that I is working, but I am more than willing to try something new.