I'm starting to lean this way more, myself. I used to think 42 was perfect but looking though 50...wow they are bright! I think 56 would be too unwieldy for my uses currently but it is hard to argue with the amount of light they let in. Maybe I'll get a nice pair with 50mm now and when my son is old enough to go hunting with me he can inherit them and I'll get some 56mm glass.I'd rather have a great pair of 8-12x50 or 56 than a box full of smaller objectives.
Those once in a lifetime shots tend to come with minimal light and I've been frustrated too many times right at the edge of dark and had to call one off as a result.
I'm the same with all my scopes now as well except for my low power 1-6x24's.