I've recently converted from an HR10. I've read that many cable boxes have a max output of less than 1920x1080i, but was always told the HDTivo could pass it (assuming I received the signal OTA). What about the HR20? I ask because my OTA channels do not look as good as they used to and I'm wondering if they are getting squeezed. I'm running Native On, all formats supported into an Elite Plasma.