I'm a big fan of FLOSS solutions, but I can't recommend KeePass/KeePassX/... over 1password. There are many people implementing KeePass-related things and most of them don't know much about secure development (nor do I claim to). 1password on the other hand has audits and professional security people. As long as they don't turn evil and give you a bad binary blob, I would bet on your passwords being more secure with them than if you were using one of the KeePass* tools.
Sure, in theory, 1password MIGHT have better private auditing and review. But there's no reason to believe they do. To the contrary, when asked about open sourcing 1password, one of their developers explained that they don't do formal code review because it's too expensive, and that none of the external experts they consulted with have ever performed a full review.
