Heres a couple links if interested...Odyssey august 2006, also the new extremes use Vishay resistors, red boards and some fancier top plates for the 2006-2007 models, some other upgrades too from my understanding.
http://www.audiocircle.com/circles/index.php?PHPSESSID=92c0hlsv8833upq3sfhcnr1607&topic=30744.0
http://www.audiocircle.com/circles/index.php?board=10
http://www.avsforum.com/avs-vb/showthread.php?t=682125
http://www.audiocircle.com/circles/index.php?PHPSESSID=92c0hlsv8833upq3sfhcnr1607&topic=30744.0
http://www.audiocircle.com/circles/index.php?board=10
http://www.avsforum.com/avs-vb/showthread.php?t=682125