Guy,
Odyssey does not offer a 7 channel amp. Klaus's website is below. The site needs updating, so it's always best to call Klaus with any questions.
http://www.odysseyaudio.com/index.htmlAs a suggestion, just go with a decent avr with pre-outs and a stereo Khartago amp(or monos if you can afford) and that should cover your 7.1 system well. You can drive your mains (via pre-outs)with the Khartago and use the AVR for the rest of the channels.
Odyssey Khartago = $799.00
Marantz SR6003 = $669.00 (or less)
This setup will be close to your budget and cover your needs to handle all the video and audio with all the new codecs, HDMI, etc.
I personally will be replacing my old Yamaha with the Marantz SR6003, but that just my preference. FYI
Dana