Our fleet consists of F450's PSD 2x4 duallies, early 90's were C&C while our new 2000's are crewcabs. We run Meyer/Diamond products. The older trucks had meyer 8-9' blades, which we quickly found out were too stressed under the weight of our trucks. The mechanics welded metal into some of the blades to toughen them up. Over the last few years we switched to Diamond 8-9' blades which are extremely rugged, and can handle the weight of the trucks.
While some say Meyer/Diamond are junk, with the amount of plows we run, we've worked out the quirks, and they work well for us.