I'm going to start dealing with Bitcoin most of the time so I want to keep my Bitcoins as secure as possible, are there any trustworthy online alternatives to blockchain.info?
I like coinbase because of the instant bank transfers and you can quickly get your btc into your bank. But you know they're not immune to attacks, the safest way would be to have an offline wallet, though that'd be really inconvenient for some.
I wouldn't really use coinbase to store coins. They are not an actual wallet and if they decide they don't like how you use your bitcoin they can ban you.
I'd use coinkite or green address if I had to use a web wallet.