I frequently record Keynote presentations using Screenflow. I record them full screen on my 23" ACD, but when I do that I can't see my speaker notes. I'm thinking of picking up a small second monitor so I can view my speaker notes while recording the slides/my audio. I don't need a bit ACD. A small (i.e. 15"?) LCD would be fine. In fact, I don't want anything bigger because I don't have space for it.. Any recommendations?