I personally would make sure to choose a mouse with on-board storage. E.g. most (all?) Logitech mice store DPI and RGB on the mouse, which means it works independent of the OS. At least some other manufacturers require a Windows “driver” to disable RGB and configure DPI, which is annoying as those aren’t available on Linux, and have to be constantly run in the background.
Basic configuration of Logitech mice can be done through Piper on Linux.
Edit: Precision shouldn’t be an issue with any decent mouse sensor. The PixArt PMW 3310 or later is good enough for even gaming and can be found in 20$ mice. Comfort is subjective, but I prefer larger mice where I can put most of my hand on top.
Edit 2: I’ve now read you’re already using a Logitech mouse and are having issue with the the side buttons. What issues do you have with them? My G Pro Wireless side buttons work for going a website back/forward in the web browser, but I don’t use them much.