It's a tricky one because there are so many unknowns, and to win titles, especially the league. You need a top top keeper. I don't have any answers about what happens next season. I see both sides to the argument. I do have some things I've been thinking about:
Personally I think they are both quality keepers, I'll always be a huge fan of David for what he's done for the club. But having said that, I've enjoyed a lot of United keepers, and I think if they Dean has the quality to match them, then i'm not totally opposed to them transitioning.
What i do like about Dean is that he acts like he's the most important person on the pitch, reminds me of schmeichel.