When I take my machine to have it serviced I do not pack it in the original box, but if I was driving 4 hours and could get it back in the box I would. And I would not let movers take it - they load a lot of items onto a dolly and if something falls off, well....... yes, they are insured but usually it is not to full value, it is "Actual Cash Value" which means it is depreciated due to use. Not to mention a lot of movers have a per pound rate and not an assigned value.
Hope your move goes well, I know a lot of people that never had a problem.