Hi, I was hoping to get some input on the difference bw a gia very good diamond vs an excellent diamond (round). My husband and I are on a budget and it seems that our options are either .62 excellent (jeweler calls hearts and arrows) diamond, or a .76 very good diamond. Both have the same color and clarity. Just wondering if the difference in brilliance is something that can be seen by the naked eye? The jeweler suggested the .76 as biggest bang for the buck. I'd love some input!