I love these pens but sharpie is discontinuing them. I do think I have enough to last me well into old age however. LOL. I love all the colors and all the sizes. Sharpie Poster Paint pens (get water based, not the oil based ones).
my first favorite white pen...uniball signo from japan. I bought them at japanese stationary stores. now I think you can do a search for them and find them. They are still great and gives you a nice white line (although not quite as consistent as the sharpie poster paint fine line white...above).
other pens not shown would be moonlight gel pens, faber castell pitt superfine pens OR sharpie makes a superfine pen that's pretty decent.