The Sony 360 will decode and pass DTS-HD and Dolby TrueHD as LPCM to the amp but i don't think the 2600 will pass 1080p, 1080i only, the list price was about £900 so £299 is a good price.
Just to let you know i got the amp today the HD sound through lpcm is awsome and if you force 1080p through my sony dvd player is works it displayes 1080p/24fps i'm well chuffed