I am retired Bellsouth with limited and general knowledge about key systems. I am considering parnering with a retired co-worker who has more knowledge, but is also inexperienced in this field. We are considering getting training on some basic small business systems, and entering the hopefully lucrative market in the growing metro Nashville area. We are both experienced cablers, and are confident that we can learn installation and programing for basic key systems, but need suggestions and guidance on which brand to begin with. We are considering Atlas, and the reviews that I have read are mixed. Can any experienced installer make some suggestions?