I think that is debatable. Having said that, you always make room for exceptional quality in a squad I believe.
In regards to the quality we are talking about if it is a question of 40 million on a wide man or 40 million on a forward then it is an easy choice for me.
That is since, most of us believe we will not spend 40 million on two individual players, neither do I think we need to unless they are both of a quality which is quite exceptional.