I'm thinking about returning my Pioneer vsx-d814 receiver for a Sony STR-DE897 receiver. I need another set of 5.1 analog inputs for my computer. I cant decide to do it or not. I'll have to ebay the receiver, cause it came with a dvd player and speakers. 1. Can i use a 5.1 source plugged into a 7.1 input? just leave some jacks empty? 2. Are the 5.1 and 7.1 jacks assignable? If not, which is assigned to dvd, and what is the other assigned to? 3. Does my dvd player need a certain feature to output to 7.1? Does it need 7.1 analog outputs, or will the digital out work? What is optimal? Do dvd players have 7.1 analog outputs? 4. Will my pioneer speakers work with the receiver. Do i need to determine if they're full or limited, or discrete mono or stereo? 5. Are there any home theater systems with 2 5.1 inputs that include dvd player and speakers for under $1000? 6. What is zone out? Does it mean i can say, record an fm station to a tape deck while at the same time listening to and watching a dvd? Please help me decide.