I'm going with the Irwin/Hansen set. They seem to be the best when I have to use them. You can get them just about anywhere. I got some Kobalts from Lowes awhile back, seem pretty good.
Nothing beat the set my old man has at his shop though. It's in a wooden case, probably been there for 60 years. Don't know the brand, with all the grease and oil on the case. Don't make them that anymore.