What do you all think about a J colored ACA round diamond from Whiteflash? I just started ring shopping in person this weekend and the lowest color grade I was shown was an I. I did not see much of a difference between an F or an I. Will a J ACA cut from Whiteflash still appear very white? Also, what are people's overall thoughts on spending more money for the ACA cut at Whiteflash? Does it really make a difference from the excellent cuts under the GIA cert? Appreciate your thoughts!