I would take the one that holds the most immediate value. Based on this list, that's either Darling or Arvidsson. I'm a big Arvidsson fan personally. It's hard to really siphon out Darling's actual role in Carolina this year, platoon with Ward? and then #1 next year?
Obviously he was signed to be the #1, but does that occur immediately? Makes me lean to Arvidsson personally