Iggy, I personally believe the bearing on the Seyco are better bearing than the DeWalt has. Fact (going by the Ex I had), I believe they are sealed bearings. I do not know anything about the Jet. That being said, there are definitely more on that could go wrong with one, but I never had any problem with my Ex, except making a minor adjustment once or twice. But, yes, more work to fix if something did go wrong, and I am sure a Seyco will never last as long as a Hawk or Hegner. Hegner and Hawk saws are for production work, Seyco and below are for the hobbyist. My opinion.
If some one wants to figure it out, is the cost of a Hawk or a Herner really more than a DeWalt, over a long period of time, considering the life span of the saws. They only have to out live 3 or 4 DeWalts.... I know they will do that.