Considerations that would be on my list would be if you need to purchase a support contract with these? if not then you are better off buying from China as these use mostly off the shelf parts and you are not tied to the maker. It's ok to have a more efficient machine but does increased output need to be top of the agenda, if not then you might as well stick to what you have or upgrade its parts. Consider your future output and what will be needed further down the line. Most charities tend to be a one time only offer when they decide to spend so make the right choice?