I'm not crazy about manfiestos or checklists period. If you made me pick something, it'd just be "Adapt" But if you insist on having some list of statements that define what agile means to you, at least pick something that is measurable and doesn't leave you in a confused quandry.
Valuing one thing over another has the impression that it is giving you information, when in fact it's leaving things more murky. If it's all relative, when would the other thing hold true? Why must there be tension between the two things?
People come to me all the time because they don't understand that the manifesto is empty of meaning. Instead they think there is something profound there. They say things like "we should eliminate all documentation because it's in the manifesto" or "we value people over contracts, so offshoring can't work"
But the manifesto says no such thing. In fact, it doesn't give much practical advice at all. It's just feel good, mom and apple pie stuff.