Have been a heavy duty D*TiVo user for over six years, currently operating three SD units (1 S1, 2 S2) and one HD unit (HR10-250). Need more HD recording capability to capture new season shows airing simultaneously. One dual tuner HR10 will no longer cut it. Since its very likely that I will be going to VZ FIOS over the next year or so, I am strongly considering a S3 or TiVoHD, but have a couple of questions. Until I get the FIOS service, I will use the S3 exclusively to record OTA network shows and the HR10 to get OTA plus HBO, SHO etc. I also have a homemade multi-room setup with the HR10 HDMI going to my main TV in a basement family room, and the HR10 component output going to a distribution amp to a bedroom TV (with future growth for other future upstairs HDTVs). Works like a charm, except I cant watch both TVs simultaneously since HR10 doesnt output HDMI and component at the same time. As long as the downstairs TV is off or watching one of the SDs Im OK upstairs. Now for my questions: 1) How do the S3/HD units deal with HDMI vs component outputs? Same as HR10? Do they possibly output simultaneously? If an HDMI cable is attached, but not actively transmitting, will the component out work? 2) A more generic HD question: Can a downlink from an OTA antenna be split with a simple high quality RF splitter as with analog cable? I would presume that since OTA is on the UHF band, this would work, but Im trying to avoid surprises. 3) I believe its been established that the S3 works with FIOS, and operability will likely improve by the time I transition, but if anyone has any pearls of wisdom, Im listening. Appreciate your inputs. Im anxious to get away from D* and back with TiVo. Before my D* days, I had an original 14-hour SA unit and loved it (except for the low capacity).