I'm looking to buy a new amp/receiver for use with my DVD player. I've got a budget of about £1000. The Denon amps sound good value with lots of support for most of the audio formats. But is there something that is a 'must have', such as Dolby ProLogic II? And is have a THX certified amp worth it? Any suggestions for all you experts out there would be greatly appreciated. Thanks,<br />Glenn Keen.