None. Just use something like Librewolf on the computer and Mull on the phone. No need to use the browser of a search engine closely partnered with Bing. Vivaldi is chromium based, which means you will be supporting the monopoly of Google. Vivaldi is also not fully open source.
I've hopped distros alot and then just felt most comfortable with arch linux. I try other distros and then just go back to arch linux everytime. I just love the AUR and the utilities that are available to arch linux. The wiki is also very good.