I also like KeePassX but its major flaw is not being able to sync or merge databases. That has led me to consider using password-store[1]. Has anyone found a way to overcome the sync problem with KeePassX?
Pass looks interesting though the convenient way of using it (plaintext name for each site) leaks information. If you're willing to give that up then it sounds like a good idea.
if you're worried about the security of that you can even take it 1 step further and add a keyfile to your login requirements. you could just store the keyfile outside of dropbox on the devices.
I use the former, since I'm on Windows, and use VMs for any dev related work. KeePass seems to have a good system in place for synching versions. Using GDrive, if I edit my pass on one machine when I try to add a new password from a second machine I get prompted to either Sync the file first or just completely overwrite it. I've yet to encounter an issue where KeePass gets confused as to what's changed and end up losing passwords in the process.