I use a Littman Select personally...got it for $55 and it's served me well. The only strong recommendation I'll make is that you get one with single-lumen tubing. I've found that double-tubes really do bounce off each other a fair amount, and the less experience you have taking lung sounds and BP's, the more of a problem that is. Whenever I'm helping someone with lung sounds and BP's and they have a double tube, I normally end up having them use mine. Makes all the difference in the world.