I sort of want to upgrade my stone from a 1.1 G SI1 ACA to a 1.2 or 1.3 G or H SI1 ACA or Expert Selection from whiteflash. However, they only got a few stones in that size range and they are I color or VS clarity (I don''t want to lower the color and I don''t want to pay extra for the VS). What do you recommend I should do? Should I contact WF and have them look for a stone for me? How many have you compared stones of ACA grade and expert selection from WF? Is the ACA really that much better? TIA.