I would just like to get opinions on what size it would make sense to upgrade to where you would notice a definite size increase. I have looked at a website where you can input dimensions and it shows a comparison. I've been thinking about the 1.5 carat range, and I can see a little size difference side by side, but not sure if it would be that noticeable alone. Would it be better to be looking more at the 1.6/1.7 carat range? Any opinions are appreciated.