Carpeting in a bedroom is unique in that you want it to be warm and inviting when you step barefoot from your bed. There are several considerations in selecting the best carpeting for a bedroom: design and color scheme, quality, and of course how much money you are allowing for your purchase.
As far as style is concerned, you will definitely want a cut pile carpeting to create that feeling of softness and depth when you step down on it. The most basic kind is a textured carpet. It is made up of yarns that are twisted in both directions to create a two toned appearance. A big advantage is that they do not show footprints or vacuum cleaner marks. Frieze is textured cut pile carpeting where the strands are severely twisted. You can get it in a variety of pile depths and it tends to be very durable. Cable carpeting is made from a thicker and longer yarn that allows it to be very soft and comfortable to walk upon. And cut and loop carpet blends cut pile fibers with looped fibers to create specific patterns in the carpet.
Color is a matter of personal taste. The only caution is to get swatches of carpeting and place them on the floor of your bedroom and view them in both natural sunlight as well as in artificial light. Make the choice after taking it home and not based on what looks best in a showroom.
In terms of quality, home carpets are generally sold as select, deluxe, and premium. Then there are commercial grade carpets and hospitality grade carpets. These tend to be the most durable as they are being manufactured for a great deal of foot traffic. The better grades are more expensive but also offer a longer warranty. Select carpeting is usually covered for five years, while premium and commercial and hospitality grade carpets can be covered for fifteen years.
So look for the best grade of carpeting within your budget that also satisfies your sense of style and your need for comfort.