Ok, I replied once but where did it go??
Well, here it goes again...
I have the same cottage-y style in my daughter's room. I purchased a bed and armoire with bead board detail (very cottage-ish) and painted a night stand I already had to match. My husband also built a toy storage unit (think pottery barn) and I had an existing bookcase, all pieces go great together.
They are a very bright white and don't look babyish at all. I would suggest buying the bed first then matching the color for your dresser to that. If you paint first and buy later you may find that your white looks dirty or yellowish next to the bed. I would also suggest a sheen to the paint. I think I used a semi-gloss.
Another tip--take the paint chips home to match paint. The color always looks different in your room than it does in the store.