Otherwise the blade will tend to stall when ripping wood and even burn some of your work. Equally important is that the fence be of a decent length and lock down tight without movement. Just like a table saw I wouldn't skimp on a router. A router is a tool that's used to cut a profile into the edge of a piece of wood. They can also be used to cut molding and special profiles.
Routers are available in plunge and fixed versions.
The plunge router is spring loaded on its base and can be pushed down into a workpiece for special cuts. The other factor in router is the bit size. This refers to the size of the router bit it will hold. Also be sure to purchase top quality carbide tipped router bits. Inexpensive router bits tend to be made with lower quality materials and ground to less precise tolerances.