Dom
You may or may not be aware of the upgraded model that's due to be released sometime early this year (the US equivalent AVR-5803 will be available soon, we normally get the European version a couple of months later).
As such, you might want to consider this new model, or wait for the new model to be released and get the AVC-A1SE at a discount.
Interestingly, the AVC-A1SE can be upgraded to almost the same specification as the new model by Denon UK, as far as I'm aware the only differences are video transcoder capability (composite/S-Video to component) and a 3.5mm control port on the back panel.
Keep us posted as to what you decide to do,
Mark