Depend on what you want... do you want a solid white or a pearl white?
I have been looking for pearl white for my car, and the Lexus Starfire Pearl (077) is the whitest pearl white I can find.
If you want to go for Icy pearl white, the aurora pearl white (078) may fit you better.
It is very white, with a hint of blue in it... Very Icy looking.
Both are very nice colour.
If you want a solid white that doesn't look like Tipex, the the Ibis White from Audi isn't far wrong for sure.