Damn, I'm an interested party, but that one's tough. Thought process: If you gave me the options, I'd lean Miller or Montgomery. I hate relying on backs for their seven-ten possible touches through the air. The coach seems to have praised Robinson's catching and blocking, but we don't know how true that is, either, so it's possible game script and talent determine Thompson sees more snaps than not. Miller vs. Montgomery is game-script dependent and depends how much stomach you have for Miller's shoulder and Montgomery's groin (I still can't believe he's already playing, frankly, but I'm not privy to any inside info, nor did I even see the injury, so I'm just going off reports.)
In the end, I would go Montgomery, even though I've never been sold on him (sorry 'bout that -- maybe he turns it around his second year. I saw a lot of dancing in the backfield last year.)