He's going to have to run between the tackles some though. Run off tackle too. Maybe you could use him as a WR/RB hybrid like Reggie Bush was in New Orleans but that's not many touches a game. A back needs plenty of opportunities to regularly produce.
Ideally you want a back like Morris, only fast. I wouldn't want us to have to change our offense when the guy came in because then you start selling you calls. You would want to be able to run the same suite of inside runs, tosses, and options that Morris has gotten yards off of, then some more. Maybe he won't be as good at the inside runs as Morris, but he should be able to do them alright to leave that option on the table.
I like Gillislee for us better than Ellington I think. He's fast and can get to the edge before the defense, but Gillislee also runs strong between the tackles and has ok vision. His cutbacks aren't always great but he always manages to get some yards. He's pretty elusive with good hips.
I still think Montee Ball is the best fit for us overall. Great quickness and vision and just understands how to defeat tacklers to get his yards. He's like Morris only a lot quicker.
---------- Post added October-27th-2012 at 04:11 AM ----------
Montee Ball looks like he's back to his old self.
http://www.youtube.com/watch?v=7eaFp_pnrAs
That dude would be an All-Pro in our scheme. Anyone still think it's his OL doing it all? On almost every run he's making multiple guys miss. Even when the defense was in the backfield.
I think he's the best RB in the class for us. My only concerns are the two concussions and the amount of carries he's had. But he hasn't missed time yet.