I am buying my first home cinema surround system and was considering the Denon 770SD AV receiver and DVD player with Castle Compact speakers. My room size is 20ft by 14ft and I will be using the system mostly for movies (rather than music). A friend has suggested that the 770SD system is a little limited as it is 6.1 and does not suport formats like THX. Before taking the plunge, I would be grateful for some advice. Should I be looking at the Denon 2805 or Pioneer VSX AX3 and if so which DVD player should I consider as an alternative to the 770SD. I am not too concerned about how the DVD player plays music CDs, more the quality of the audio and picture on movies.