Ricky,
Give me some time to pull up further info and old links.
I had the AVR-5600dts, prior to that I had the 8000 for a home audition.
Now I still have that 5700
Here is one for the start.
http://www.wire-x.com/5600.htm
http://www.wire-x.com/8000.htm
The original press release had further info also.
Back in those days I did not save many links, But I'm sure I have further info with complete specs on both to compare.
It may take a day or so to find, I may even need to look over some old 4mm backup tapes
I'm a pack-rat to this data, but my memory is far from perfect.
I know the 5600 did not have the copper-plated chassis, but the rest was the same. Although I did not take off the lids.