I'm looking into buying a sound bar, and I'm curious how important it is to get one with support for HD codecs. Specifically, I am considering getting either the Sony HT-CT150 or HT-CT550. In the Amazon description it says the 550 supports Dolby TrueHD and dts-HD, which the 150 does not. This seems like it might be a problem; for example, some reviews I've read said that streamed Roku movies have noticeably worse sound on the 150 than the 550 due to the better codec support in the 550. However, from my (admittedly basic) understanding of these things, since no bar is actually producing 5.1 sound, won't any HD audio streams automatically be downgraded to a lower quality equivalent? Is it worth it to spend more money to get more codec support?