If Suarez does want to leave in summer then we should be demanding 60 million minimum for him, given that Torres went for 50 million, I would want us to get nearer 70 million to be honest as he is 3rd behind Messi and Ronaldo in my opinion.
If we do get 60 million I would want all of that to be invested in first team plus whatever else the owners are going to spend, maybe then it wouldn't be so bad if we could get 3 quality players in his place , although of course I would prefer him to stay as you never know how other players will turn out.