Keyboards are a vital peripheral for PC users, and regardless of your budget it's important to pick the right one. The most important consideration is what sort of feel you want. For instance, most cheaper keyboards use dome switches mounted on top of a membrane, giving very little tactile feedback. You may want to consider choosing a keyboard with mechanical switches as these provide much greater tactile feedback. Mechanical switches are available in different grades, denoted by a colour - black, brown and blue for instances and each has its own set of characteristics.
These keyboards are intended for everyday office applications and are connected to your PC by a cable, usually USB.