I took Brendan's words that a deal for Suarez is "unlikely to be successful" because it's so late in the window that we can't replace him as a hint that he would consider a cash+player deal from Real. I think from Real's standpoint Di Maria is expendable and yet he is still probably a better player than Willian or Costa or any other of our "ambitious" targets this summer.
The key difficulty will be convincing the player to join us, but I think it's not impossible. Somehow I think Ozil would snub us, but Di Maria would join after some protracted negotiations. Again, a "hunch."
Don't get me wrong, I am not arguing that this deal should happen. For one thing, I've never particularly been a fan of Di Maria. But I think it would make a lot of sense for all the parties involved and if the obstacle of the player's agreement can be overcome, I could well see it happening. Real will probably value Di Maria at around €40M, which would allow us to say that they reached our valuation of Suarez (£50-55M). Our club would probably be happy to solve the Suarez problem decisively instead of waiting for a new explosive chapter of this saga next summer and in Di Maria they could get a high-profile player who we would have no chance of signing otherwise plus some extra money for another centre-forward.
People who are thinking anybody is going to offer us £40M+ AND Di Maria or a player of similar caliber are not living in reality. And don't give me Bale as example. The price for Bale is astronomical because Florentino chose Bale as his "galactico" signing this year and when he wants a new toy, he gets it no matter the cost. Suarez is as good as Bale on the pitch, but as far as Real is concerned he is not a galactico and they won't value him at anything close to Bale or Ronaldo.