I am starting nursing school in May. As a new student, I have to purchase a stethoscope. I would like to get the Littmann Master Cardiology. But, I've been told that stethoscopes often "grow legs." So, I was thinking about getting the Littmann Classic II S.E. Hopefully, I'll get the master cardiology for a graduation present :) What type of stethoscope does everyone have? Do you have any recommendations?