I think coinbase is still good service looking after the security and safety of our coins. The exchange cum wallet is good in handling and supporting the customers at first stage. If you ask another one then I believe in small exchange like livecoin and yobit exchangers because they are having wide range of features. Specifically investbox in yobit which gives us interest on keeping the money in their.

Though they are not wallets but their function is pretty convincing to me. Rest are all big exchangers and could be used with same higher fees as rest one.