Definitely keg it and drink it if it tastes good. Don't worry about it. The only problem I see with drinking a beer that's in the process of souring is if it has buttery diacetyl. Otherwise it's fine, healthy, etc... drink it! Through most of history, people have drunk beer that is in the process of going sour. There's no problem with it.
Also I need to say, IMO, don't bother with secondary unless you're intentionally racking a beer to a souring vessel, I think it's a waste of time for a clean beer unless your yeast his unhealthy. Even then, your secondary should be a keg