It sounds like you did the right thing.
I just bought a winder for $130 and it was a mistake. It started to growl in less than a week.
I don't know how much you have to spend to get the quality you need to provide quiet, reliable operation, but I would think that you have met that with the model you bought. From my research it looks like direct drive motors are problematic, and the belt drives tend to be on the better units.
I must admit the Jomas prices on the Wolf winders look really good.
Maybe you could update this thread in a month or so to let us know how its worked out, I know I will be interested, I can't find much on the forum about winders.