I'm not sure if you're currently building your website / have a development background or not, but if you are, and you want custom functionality like Related Products, Product Videos, Related Articles, Collections Sliders etc... I highly recommend some sort of Metafields augmentation tool. When I built Rose & Rex I looked around and found that there was no fully baked App that let's you add and manage metafields easily, so I built one. The result is Metafields Manager.
Obviously I highly recommend the tool that I built and use, but I think if you want to have a stand out store- you'll want to have some sort of extra functionality to seperate yourself from the pack in your product vertical. In order to build this functionality a Metafields augementation tool (like Metafields Manager) and a little bit of elbow grease is a necessary investment.
Good luck developing your store, it sounds like you're going about this in the right way! Also feel free to shoot me an email from my website (http://www.thebestagency.com) if you need dev help in the future!
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