Latest update from the man in the know at Denon is that the AVR-2309 won't be available for us to review for some time - no earlier than 22nd September, which is the cut-off point I've set for products to be eligible for the Ultimate Guide to Home Cinema.
But as Clare said, we've plenty of other receivers to test in this price range. In fact, we've just set-up Sony's new STR-DA2400ES (£500) and the Yamaha DSP-AX763 (also £500) ready for test inÿthe November issue of What Hi-Fi? Sound and Vision. If I was you, I'd wait to see how those two get on before committing to a Denon (or any other) purchase.