A doctor will use their stethoscope many times a day, so it makes sense for them to choose one that is durable, reliable, comfortable and well-made. There are several different kinds of stethoscope. Some are designed for general use and diagnosis, while others are aimed at a specific role such as cardiology. The type of stethoscope you choose will depend on the kind of work you spend most of the time doing.
So what is the best stethoscope for doctors?
A good stethoscope will be lightweight, have a tunable diaphragm, and will fit your ears comfortably. Some general use stethoscopes have a non-chill rim so that they are more comfortable for patients. A cardiology specific stethoscope such as the Littmann Cardiology III model, may come with a dual lumen to cut down on the interference that is caused when the tubes run together.
If you suffer from a latex allergy, then something like the Littmann Master Classic II, which is latex free, may be a good choice for your needs. This headset comes in several different colors so that you can pick one that is easy to distinguish from the others in use in your office.
For general, day-to-day use, a stainless steel stethoscope with binaural ear pieces and a non-chill bell/diaphragm is a good choice. ADC makes a popular range of stethoscopes in this vein, and you can find them quite easily on Amazon.
A doctor cannot afford to skimp on their basic equipment, and a good stethoscope is an important investment. Try to choose the best model that you can afford, and prioritize the kind of work that you will do the most of. There is no point opting for a cardiology quality stethoscope if you are a GP that generally deals with more general enquiries and infections, for example.