Agree on Cac. Very delicious mango with high production and great disease resistance.
I'm confused by PPK over Lemon Zest preference. I'll bet that the tree(s) from which the forum members obtained their samples from (Walter's / Gary's ?) had a bad / washed out year last year. PPK is definitely outstanding, but Lemon zest are more strongly flavored and larger. It's beneficial to have both though, since PPK is earlier. I have the complete collection -- 3 LZ, 1 PPK, and a OS seedling :-).
I have never been totally wowed by LZ, but I hold out hope. I have 2 planted out though, and the wife loves them. Thus far, I have derfinitely preferred PPK and OS to LZ. As John said, the PPK is a flavor bomb, and seems to be productive though my tree isn't fruiting yet.