I was going to use a .5 (not graded but has been guessed to be between .4-.5) family stone and use our budget to build a halo but am now wondering if I should just get a plain solitaire (I like thin and slightly cathedral in rose gold so blue Nile fits the brief) and put the money toward a diamond. I did a HCA and it says worth buying if the price is right and the price seemed pretty good to me. I don't need (and can't afford) the best of the best, a nice stone is enough.