I'm using a G305 at home, which has been nothing short of amazing. Tracks fantastically, and it's light and wireless (using a AAA lithium battery in it.) Hoping to be able to try out a G Pro Wireless to see if I want to make the plunge, but in all honestly, I think the G305 is here to stay since it's cheap to replace and feels great in hand.
I use an MX Master 2S when travelling to clients and at the office. It is FANTASTIC. god, the buttons, scroll wheels, thumb buttons and the integrated button in the thumb rest that also works using directional input + press, this thing is a work setup dream. I tried using trackballs, but weirdly enough, they ended up hurting my wrist when it typically helps other people with wrist pain.