In order to play SACD you'll have to stick to analogue leads I believe, as I don’t think that SACD digital output will code down a single bitstream cable.
My 2807 has a ‘Denon Link’ socket, yours may also. If your DVD is a reasonably high spec Denon you can use this to transfer SACD outputs from your player. Otherwise you’re stuck with the analogue pairs.
I really wouldn’t worry too much though – I couldn’t find much difference at all between the analogue pair and the digital output for playing CDs on my set-up even with a back-to-back comparison.