I've tried a number of brands, Haines, Fruit of Loom, Lands End, and Jockey.  These are best, first, they come in more waist sizes not sm, med, and large; the waistband does not turn over, the fabric is softer and more substantial than the cheapies, and so far the leg elastic is holding up well.  And at 4 for $19 they simply are unbeatable.