A friend of mine is buying a new receiver and wants to make sure it adequate, without breaking the bank. He found an Onkyo that was marked down from 1000 to 600, but it doesn't have HDMI inputs or outputs. My questions are.... 1. Is HDMI both audio and video? 2. I assume you only need the HDMI ports in an AV receiver if you want to use the video switching capabilities of it. 3. Can you use HDMI for video directly from the TV to the HD source? And use an optical audio cable for the sound from the HD source to the AV receiver? I really know nothing about HDMI, so any help would be great.