I went through this recently and ended up with a Logitech G604, which I would endorse. It ticks all of the author's boxes (ergonomic, scroll click toggle, extra

I went through this recently and ended up with a Logitech G604, which I would endorse. It ticks all of the author's boxes (ergonomic, scroll click toggle, extra buttons, long battery life on one AA, works on glass, included USB dongle and bluetooth support) and goes above and beyond: - It's very difficult to find a mouse with a wheel that lets you choose what mode it's in. Most of the recent Logitech mice (e.g. MX Master) try to detect it and have fragile mechanisms. This one has a big hefty metal wheel that still spins even in clicky mode, and can be switched to frictionless with the button behind the wheel. The last mouse I had that could do that was my trusty G500, which was a worthy successor to the MX518. - It has a ton of buttons, but it doesn't feel like too many. (6 under the thumb, which feels more reasonable than the side-numpad on some mice, two next to the left index finger, and two on the "wheel tilt") The 6 under the thumb are reasonably easy to distinguish by touch, and if you lay them out right you can even press multiple at once for common chords (e.g. Ctrl-Shift, Command-Alt) which leads me to... - All of the buttons, including the wheel tilt buttons (except for the bluetooth pairing button) are remappable to keyboard keys and there is a mappable shift key that reassigns all of the buttons, which allows for rudimentary chording. I have one layer for modifiers and one layer for OS commands. My wheel tilt switches desktops left/right, which is tremendously useful. - It has 5 onboard memory "slots" for different mappings for all of the buttons, DPI levels, etc. that are OS independent, which means you can preprogram them and then use them on whatever OS you connect the mouse to. I have settings for MacOS, Windows, and application hotkeys that I use that can be toggled between with a button press. The programming application is Windows only, but you don't have to install Logitech's bloatware, you can use their standalone "Onboard Memory Manager". https://support.logi.com/hc/en-us/articles/1500000915041-Onboard-Memory-Manager https://support.logi.com/hc/en-us/articles/1500000915041-Onb... The shortcomings are: - It's a big hefty, although I tend to prefer that - The wheel is sometimes easy to scroll while pressing it, and the detents feel a little shallow. I don't have my muscle memory trained yet, but theoretically you could press all the Emacs modifiers without taking your hand off the mouse.