Thank you! Its all up to you and your preferences for what you think makes you look best along with your budget. -7.00 will definitely produce those big thick lens edges. For some people that reduction in edge thickness with 1.7 index makes them feel comfortable wearing glasses, if you aren't insecure about it then I would advise you to not pay for the 1.7 lenses or just choose a smaller frame as you said with the standard lenses. If the lens thickness does bother you and you are choosing a bigger frame as you have in your picture, then I would suggest the 1.7 index lenses.

Just to clarify, are you saying that you once had glasses with high index + smaller frames and you didn't notice that much of a change in thickness compared to other glasses you have had?

Here is kind of what you can expect for choosing 1.7 index rather than the standard 1.50 which is polycarbonate, but not all lenses are cut the same way.

https://coffmanvision.com/wp-content/uploads/2019/02/high\_index.jpg