I've used some el-cheapos before...
My boss used to buy whatever metal cutting blade was cheapest to run on a junk power saw for cutting rebar an steel decking. Problem was, cutting decking he'd go through about a blade a cut. Then the one time he went to the store, they were sold out of the cheap ones and he needed blades bad, and picked up a pack of Metabos. Yea, no more cheapos, the Metabo blades held up so much better there was no comparison.
And I have a huge selection of their stuff for a 4.5" grinder (two different thickness cutting disks for stainless/mild steel, couple 6" cutoff wheels, 6" grinding disk, 4.5" grinding disks, flap wheels, knot wire wheels, knot wire cups, masonary cutting disks, masonary grinding wheels....)
Oh, yea, they're made in Germany... the Krauts know quality.