My problem isn't with benching Cech, for what it's worth for my money he has been quite suspect and I think unless you're being beaten by someone who has a thunderbolt of a shot you shouldn't be being beaten as a keeper at your near post.
I do not rate Ospina, I think the guy is a total calamity. I like the young Argentine we have as third choice I would be much happier giving him a run if we dropped Cech