Hi, hubby & I are celebrating 10 years w/a new setting (I just got a plain white gold one when engaged) & I''d like to trade in my 1.75K round cut & .48K round cut (both VERY good stones) for a very nice (and big!) cushion cut . . . any suggestions on how to do this & where so that I don''t get ripped off???? I''d love to get what I want without spending too much more on the new setting/center diamond. I got the original diamonds from a local dealer who supposedly gave them to me close to wholesale. let me know what you would do to not lose any of the money you''ve already invested!!