It isn't that easy to just jump side to side. Also a RT is more of a mauler. Gaither is not that. What Oher did last yr is unheard of. I do not think Gaither can do it. I think he is to soft to play on that side.
Gaither is lazy. He will get a big contract. Oher will get a moster contract. You will only be able to afford oen of them. Also I don't think Gaither can play RT. So get the value while you can. Much like the McNabb trade.
It is location more than anything else. It is a quick bus ride. Car and NY are quick flights. STL is a little farther away than they usually go. I would have expected Philthy or the Jets.