Does the chinese ones come with software? Good software makes a difference
I have bought chinese machines, but only from US distributers. Couple of things. For one they tend to have NO documentation. If there is any markings on the electricals they will be chinese gum labels. Second, the chinese are really behind the curve on electricals. Not so much the components but the workmanship. Bad crimps, bad solder joints, loose screws, etc.
I would honestly consider importing one of these machines. Even as a core. Just use the welded table, slats, etc and put on new drives and electrics. It would be hard to build your own for that money. But I dont want to send a check to some guy on the other side of the world with a culture that would consider screwing me a victimless crime. Plus how much is shipping, customs? Etc.