Welder/Fabricator in work has used the corded Hikoki 9" and 4.5" corded grinders. His stuff gets a very hard time and a lot of daily use.I had the worst time with mine, I wouldn't reccomend to anyone.
He says that the corded Hikoki Makita copies are good for the money - last as well as most.
Has just switched to using Hilti corded stuff this week. Much more expensive, but he says the 3-year Replacement Warranty, quality and performance of the Hilti gear is worth it in his case.