First of all, how am I violating my PE ethics? You sir need to get your facts straight and look up every definition for everything that is spewing out your fingers typing this ridiculous comment.
It is not a crime to prefer 1 manufacturer over the other and I always share my final plans with client. I disclose what manufacturer I am using and if they want it changed then I do it. I am not forcing them to do anything. In addition, my clients do not have the mental capacity to specify equipment, so they trust me to do it for them and a lot of them don't care what manufacturer I use.