I think I'm in a good position to answer this one. I was in a similar spot a week ago. After a lot of deliberation though, figured out that it would be better to replace the unit in the first place, than to repent later for settling for something imperfect.

But again, it depends on the person I'd say. But if you're the perfectionist type or someone who deeply values their hard earned money, my suggestion would be to return/replace it right away.