I am not a trackballs person and I know where my balls are and don't have to track them. I use a Wacom tablet.
Don't forget your trackpad, I know you use that on your laptop.
Only time my mouse gets used is when modeling in Blender. Most everything else is the Cintiq (I can see that going subscription, maybe have to go to a Huion after that, if that does happen, I just wouldn't be surprised, or I'll just have to do sketches the old fashion way and bring them into the
computer (I still have one of those wacom pens that captures what you sketch on
paper as a png file). Last is keyboard (even have extra loud switches to remind me of the good ole days) for gaming/programming/general text based stuff.