For loaded touring / commuting, where durability and reliability hold sway over mere weight, which spindle style is best? (For modern 9-speed capable frames). Or should spindle style in any way influence crankset choice? Self-extracting cranks would be an appreciated feature, if all else were equal. Disregarding chain ring size and cassette size and even cost, which crank, rings, cassette, and chain BRANDS are best suited for this purpose?

Thank you for your help with this as previous posts really don't address the issues of durability and reliability - just weight and cost.