Spoke to a CSR at Voom (pretended I worked for Sears) and asked about the OTA antenna's. The installer will decide which of 2 antenna's to go with. A "stealth" antenna, presumably one that attaches to a gutter or a Yagi. According to the CSR you have to go with their antenna to incorporate local channels into the onscreen guide... why would this be? Coax is coax right? Why wouldn't an existing antenna work just the same?