I have both nook and iPad and there is no way that iPad can replace my nook. I say you should give iPad a chance and try it for yourself. People gotta understand that it is not a matter of being darker or brighter LCD. LCD will strain your eyes regardless of its brightness. You will feel that it doesn't feel like it is not straining as much but it is. Also, iPad is horrible under direct light but e-ink is same as paper even in direct sunlight.