We have two DeWalt's in our shops. Mine is set up with two grinding wheels and my son has a wire brush and a coarse buffing wheel on his. He has a third unit set up as a finish buffer. The dirty work takes place in the metal working part of the garage and the finish work takes place on his side where there is not near as much grit around. The DeWalts are very good tools for the money.
Both DeWalts were purchased on line and even with shipping, were cheaper than either Lowes or Home Depot in our area.