This is my first post on this very informative forum and I am looking for some advice. I am building a new system from scratch and will likely build it around a 50" Panasonic 1080P plasma. Speakers will be a 7.1 system with in-wall/in-ceiling speakers. My sources will be an HD DirecTivo unit and at least two of the following three players: HD DVD player, Blu Ray player, Denon 1930 universal player (for SACD and DVD-a). All of these sources have HDMI outputs available. The receiver that has been recommended to me is the Pioneer Elite VSX-90 TVX, which has two HDMI inputs and one HDMI output. For which of the above sources is HDMI absolutely necessary, and is the above receiver a good fit for me? Thanks in advance for any advice.