looks fantastic! On a stone cut that wonderful, you'll never see color in it, definitely not by looking at at head on.
I agree with Swanky but feel you need to get someone at goodoldgold to look at this stone for you. My stone is also I, SI 1 and looks like a headlight. It's an AGS0 cut and throws back more white light than my E color grade stone, ideal cut. The AGS0 is just so much better cut.
If you want white, the color grade is important but not the only thing to consider.