Currently:
This is the Logi M650 L[arge] Left. I am right-handed but I learned to mouse with the left following prolonged spell of RSI.
Keyboard is a recent purchase and I am still evaluating it: Keychron K15 Pro Alice layout (brown switches, for the afficionados). It’s really great. I am still transtioning from Logitech MX Mini (which is my backup). Mechanical is nice! I am also learning to properly blind 5-finger type which is a huge bore after too many years of my idiosyncratic method. But I am hopeful that the Alice layout and better technique will help with my RSI flare ups. Also at the moment I lug the Keychron to the office and home with me wrapped in its huge box, which isn’t fun. I am deciding whether I will get a second (perhaps the smaller 65%) for my permanent home desk, and I am waiting for their next sale (they seem to be quite frequent).