Welcome to Android Central! Since you're going for the Pixel, then the best choice would probably be the new Pixel Watch, which many reviewers are comparing directly to the Apple Watch. You have a lot more options for earbuds, but certainly the Pixel Buds will have the tightest integration with Pixel phones. The main choice there would be the cheaper Pixel Buds A and the top-of-the-line Pixel Buds Pro. The Buds Pro are supposed to have somewhat better sound and more Assistant features, but if the latter isn't that important to you, then the Buds A would probably be the better choice (also because the Buds A have a little stabilizing arm that the Buds Pro don't, and I've read that this makes the latter feel a little less secure in the ear when running).