"What is the best white paint?"
Pictured above are a few of my favorite white paint colors. Swiss Coffee and Swan Wing are very similar paint colors so it's just a matter of brand preference. They are both just slightly off white and a little warm. If what you are looking for is totally pure bright white you can't beat Ultra Pure White by Behr. With some research and polling I've discovered that Ultra Pure White is whiter and brighter than Super White and Decorator White by Benjamin Moore and Sherwin Williams Extra White.
What is your favorite white paint?