Advice on large Radiant

[Golden Bay]

I am hoping to get some advice on the purchase of a 3+ ct Radiant. I have seen 4 stones in person at 3 local jewelers. The Original Grossbard cut stone was by far the most brilliant, but its K color has me a bit worried. It looks beautiful alone, but when we add side stones I''m afraid it has a yellowish hue (although my husband couldn''t see it). I''m not in a hurry. In your professional opinions, should I keep looking? What should I look for or watch out for? What questions should I ask?

I do have a copy of the GIA on the Original Radiant Cut.
3.02 carat
9.28 x 7.95 x 5.07
K SI1
Polish - Very Good
Symmetry - Very Good
Flourescence - None