gspencer,
the problem is that it seems he wants to control lighting in other parts of his house unrelated to his theater. He will run into problems with Harmony's activity based setup b/c you can not run one activity while another is taking place. Anything more than turning one light on or another light off will require either alot of buttons added to the lcd screen, entering device mode or setting up an activity...and that is where the limitation of the Harmony will come in. As I said, Harmony is great if the lighting is just part of your theater and part of theater related activities...but once you try to control the rest of your house you will get stuck because you can't run the "lighting" activity while in DVD activity.