Well I carry my 505 with me everywhere, in my coat pocket, so I need something that offers a certain amount of protection.
I chose the Tuff-luv case because it was smaller than the supplied Sony cover and yet offered the same amount, if not more, protection.
Also has the added benefit of an 'A' stand so I can stand it on the table when eating out on my own (companions tend to complain when you read at the table and ignore them).
