Is it worth spending a lot for center stone in halo setting? I was all the time looking for a perfect stone for a solitaire ring, but if i now change the setting to halo with plain band - how much difference the quality plays? I mean usually stones around halo are not so great and also halo settings cover up more of the center stone. If i pick something from D-E and the halo ring is G-H, will it match together (some being more yellowish)? Setting itself is going to be either white gold (probably 14K cause it's stronger or platinum).