I am think of buying a AVR 2805. I have never owned a video receiver before. How do they work? Do you associate a 'DVD' button on the amp with both the audio and video from the DVD so it automatically switches them both? I already have a basic Philips surround system (although I am not particulary impressed) so I am not sure it is worth the outlay. I have recently bought a Hitachi 42PD7200, so I am almost spent up. The next £500 will be the last for a while.