Hi welcome to the forum.
inregards to stethacopes,there are a lot of threads about this topic. If you would like to glean information from them use the search option in the right corner area.
I personally use a litttman classic ll. Love it, I don't have great hearing when I am around a lot of noise. But this really cuts through all that.
Also getting good BPs is gained through practise. You can have the best stethoscope in the world, but not hear anything.