That's a good resource for sure. I do take slight exception to his assertion that exit pupil size doesn't matter. Yes when using a telescope you often have to deal with a tiny exit pupil. But it's a pain. The bigger the exit pupil, the easier it is to view. Another important factor is eye relief, which is the distance your eyes need to be from the eyepiece. If you wear glasses, then a long eye relief is useful because you can fold the eyecups over and easily view with your glasses on. Anyhow I think you made a great choice with those 10x42's.