Raybestos "Professional Grade" were the ones to get (these were formerly the Spicer joints everyone mentions). Unfortunately Affinia Group (Raybestos' parent company) was recently bought out by Federal Mogul (parent of Moog) so it remains to be seen if quality goes down the crapper.
Napa's joints (at least their higher grade stuff) were made by Raybestos, so the same unknown would apply to them too.
What you will want to look for in a joint (at least with the lower joints) is a very bright shiny stainless-steel appearance of the ball joint stud (not plain dull-looking steel). A Raybestos (Affinia)-made joint will also have a gold-zinc colored body (the ones made under Federal Mogul I think will have a black body w/similar bright stud).