I'm screening movies on dvd with Optima EP 739 dlp projector for movie clubs, showing films on 100" diag. screen to 20 - 40 people in small conference rooms, living rooms, small classrooms.
Was told to make sure receiver had prologic II. That's all I know. Would like to get good quality sound, clear dialogue and keep it under $500.
Take a look at Yamaha, they are a great match with paradigm and are great for movies. They have all the different goodies that you will need. Not sure of the prices in the US, but I would atleast get the Yamaha rxv650, if you can afford then move up to 750, and if possible the 1500 is the best.