I currently have a 1.63 carat round stone that I would someday like to be around 2.4-2.5ish. I am busy saving for this upgrade, since it won''t be inexpensive! I have enough saved now that I could upgrade to somewhere around a 1.85, which would snag me another .3mm in size. Do you think it''s worth it to upgrade for .3mm? Would I be able to see that much of a difference, or should I just wait a little while longer until I can get more of a .5mm increase? The only part that''s a bummer is that to get another .5mm, I have to cross the 2 carat mark which greatly increases the price to do the upgrade! Thoughts?