DNA Testing - which provider is best?

My father who is 76 yrs old (GGparents from Chihuahua) and my uncle is is 93 yrs old (GGparents from Sonora) and my father in Law 70 yrs old (Teocaltiche, Jalisco) have agreed to do DNA testing. Can anyone recommend a DNA service provider that they have used in the past. Looking for something priced reasonable with the most information returned. Thanks for your assistance.