Another vote for Moore. When I played my team mates used to be in awe of the superb reaction full length twisting in mid air saves. I would say that they were the easy ones. It's the mishits and deflections that are the problem because half your game as a keeper is anticipation and positioning. Just try moving forward, setting yourself slightly to the right, weight adjusted for the shot and then finding in less than half a second you have to adjust your head and eyes to take account of a different trajectory and speed to the ball and at the same time adjust stance, weight and then back pedal at speed. Another thing. In a fast changing situation you can't guarantee being in the optimum position by a couple of feet every time.