Going back to the routers(!) I find having a 1/4 inch one is well worth it. You can use it one handed, and generally far more places than the 2300Watt monsters, such as for hinge recesses on fixed door frames. I often use it in one hand upside down with say a rounding-over bit, and move a piece of wood across it with the other hand. I've had a Bosch one for many years which has a Swiss motor, designed as a toolpost grinder. It's quite a small diameter so it's easy to hold by the body. Also great for sharpening gouges, with a stone capable of running at 30krpm.