#2, #3 and #4 look very nice. Faint fluorescence with D color is still fine. As for medium, well, why don't you give them a call and ask about problmes like milkyness or cloudyness? Usually medium fluor isn't an issue, but in D color it might be. Proportions are good on all stones --#1 is a bit deep and looks quite smaller, even though it's the bigger. Are you able to get a Sarin for them?