For many the Sony 7000 has been the standard to measure everything by--video and audio. Yes, I've seen it--many times. Most highend stores had it: both to sell but also to show off their other items (projection TVs, etc.) Note that in most magazines, it is the most used DVD player that is used to test TVs, projectors, etc. It has excellent video. It used to cost about $1,000 as well. So you found it for a very good price. The negatives would be no DTS or 96/24 support--again on the audio side. The 7700 corrected this, but many felt that the 7700 did not have the build quality of the 7000. The 9000ES has it all, including better audio, video, and a 5 year warranty, but it lists for $1,500.
Be aware that you may not be concerned about CD audio, but audio from DVD-Video is important as well. In comparision, with the Panasonic A7 ($500) and JVC723GS ($600), the audio while playing DVD's was so much more dynamic and clean with the S9000ES. The 7000 would be superior to the A7 and 723 as well, but doesn't equal the 9000. Because the 9000 is so good, is why you can now get a good deal on the 7000.