Always a hard call on a question like this as I don't know what your personal taste is like. If you think of yourself as more of a purist, one that likes to make things look like they belong in the house of your period, then I have ideas. I'm not saying that it should look like it was original, as there were no kitchens as we know of them today, but a look with the style and paint that makes one wonder how much of it was old.
I have to disagree with the above poster as I think natural knotty pine like what you have is UGGG! and to paint it white would be another UGG. I'm also not a fan of the flat paneled doors that you are think as far as THIS case goes. I do agree that the flat panel doors are the nicest style out there and is most likely what I will use in my kitchen addition, but I'm not sure that is what you are after?
Anyway, have any pictures of ones you have seen that turn you on? Any more input that we can help advise you with?
Bellow are your re-sized pics and one of a cage bar I did that somehow reminds me of your situation. Maybe just an idea of a "real" color other then white.