For dough such as bread or pizza dough, you're looking for a 220 to 250-watt motor at a minimum. Higher-power motors will handle heavy, dense dough easier. Also, ensure that the dough hooks are sturdy and well-designed, and pay attention to the overall design of the unit. You're looking for a mixer that's ergonomic, lightweight, and easy to handle but not so small and flimsy that it takes excessive strength to work with when processing large masses of dough.