I've used Blue Point and Blackhawk... they're fine. I haven't laid hands on a Williams modern combination wrench (but have some offsets, and an adjustable), solid stuff for the money.
My experience with Silver Eagle is limited. However, while I like Matco, I'm not thrilled by Silver Eagle. Someone has a pic of a dual stamped Husky/Silver Eagle socket. If that is the case, just buy Husky. Lol. Got some of their wrenches... they're a little lobster claw, but pretty tough. Got a little Silver Eagle in my work box (issued), and I just can't get behind it. I have a 10mm Silver Eagle wrench that I modified for EGR valves (some vehicles in fleet use 9/16", others have 10mm fasteners)... bent it, easily, by hand to get underneath to the bolts.