Do you mind sharing the name of that watch face? I've bought several from the Galaxy store. I like that layout.
BTW, to answer the original question. I bought the frontier 5 months ago after debating for weeks. IMO the gear S3 (classic/frontier) is one of the best pieces of tech I've purchased. Paired it with different brand phones and now w the Note 8. Battery life, style, durability, custom watch face development, is phenomenal. Well worth the $$ and they go on sale at Best Buy and Amazon for $300ish almost every couple of weeks. I also own two Android Wear watches and there is no contest for round the same money.
Last...the Sam S health app is fantastic for tracking and nutrition. Very detailed and customizable. Of course it's perfect w the gear line. You can also integrate third-party apps as well like MyFitnessPal, etc.