I have to disagree with that
Heaton is first team quality for a top side, Robles is back up at best
Disagree here Mikey.
Robles is a very good and solid keeper!
If we were to go out and replace him it needs to be a keeper that will be a significant upgrade and win you points on his own.
Heaton is doing that at the moment for Burnley as he is constantly in the action- think Marshall at Cardiff 2-3 years ago.
Being a keeper who is called upon when not having much to do for long periods of the game is something different (Mignolet at liverpool a great example of that).
We need to be looking at what spurs did when they swapped Brad Friedel for Lloris, at the time Friedel was dependable and seen as one of the better keepers in the league, they then went and got Lloris even though there keeper position was not an issue because he was Lloris and one of the best around