I'm just about ready to place my order with, but not sure to get a 4 or 6 prong white gold setting for my diamond. I've pretty much settled on a .72 ct round stone. I am concerned with a stone this size that a 6 prong setting might cover up too much of the stone ? How much of a security risk is it to go with a 4 prong setting over the 6 prong. Suggestions and comments please.