Switched to BEPx3.  I decided that I have enough lung function to spare and will let them take the hit in order to reduce the chance of neuropathy in fingers and toes.  As I am a non-smoker under the age of 50, lung impact is minimal.  Spoke with Dr. Einhorn, famed TC researcher and Lance Armstrong's doctor, he urged me to consider 3xBEP for these reasons.