Honestly I would have no idea what to recommend to you right now for very strong security. The crypto world is an absolute mess right now as people have been figuring out that the NSA had their hands in the development of much of it and there is a lot of question as to what is really secure versus what they may have planted.
The community is doing a lot of auditing right now so I'm kind of waiting to see what comes out of all that.
As to what is "secure enough" for your purposes -- something like KeePass would probably do. I'm personally staying completely clear of any web based or cloud solution, i've never liked the sound of it, and with the crap the feds are pulling these days it's incredibly hard to trust them.