Now that I think about it, my father has tons of oddball wrenches (most/many are machinist wrenches) and sockets and ratchets around from "other" companies, like Williams, and I find that these are often just as good if not better than Snap-On equivalents. Unfortunately I only have a couple of a certain brand normally. Snap-On is probably the best commercially available as I think most of the oddball brands I have are long out of business. I normally pick up this type of stuff at yardsales, which is great if you ever have to grind a wrench thinner, grind it wider (easily turn a English into a metric size) or cut it stubby- who could bear to do that to a Snap-On? Having an assortment of brands also can be helpful because they often have different offsets for open end wrenches, so you can switch in tight spaces. S&K ratchets are great too.
But, come to think of who makes the best tools, well, I do (custom cam nut removal tools):
