As a United fan, I don't want Otamendi and Ranks is a pipe dream. A player like Laporte could be a better buy: more potential, left footed(LvG preference), and cheaper. Otamendi looks like a one hit wonder and a player that isn't worth 50 million.
I'm partial on Di Maria tbh. I wouldn't mind keeping him, but if United can recoup all the money they spent on him it would be good business. We have no use for him right now as we have depth in midfield and can use the money next year on Bale if Reus moves on to Real. Caboose is right about the Galacticos though. Only way Bale moves is if he is pushed out by Hazard or Reus, the latter more likely.