I want to understand video bandwidth, and frequency response of video switchers. While investigating surround preamps, I've noticed several that some have a video frequency response of dc-10mhz, while some are dc-100mhz. For instance, the Rotel 1066 is dc-10mhz, the Anthem SF20 is dc-100mhz. I want to know how much response I really need, how much only applies in specialized situations. For video components, I own a Sony 32hv600 tv and a Sony ns715p dvd. The dvd player has a 108mhz dac, which means that the maximum bandwidth is 54mhz, if the dac doesn't oversample (I don't know if it does or not). So, what I think I care about, is how much bandwidth is necessary to provide a good connection between those two components. I run the dvd player in progressive mode. Also, I probably care about near-future technologies which will require more bandwidth. I scanned through the faq's but I might have missed the discussion if it exists there. Thanks!