I had a 1m Chord optichord which I used to use between my RDR-HXD910 and DAV-S550. Worked fine, sound was better than just playing DVDs in the S550.
I still have it in a bag somewhere as it's all HDMIs these days. Shame it's not any longer, I could have sold you a bargain.
A/V: Sony KDL-V40A12U & BDP-S350, BT Vision, Onkyo TX-SR875, B&W MT-30 7.1, QED audio cables, R.A power cables
Hi-Fi: Arcam CD72T & A65+, B&W 602S3 & using MT-30s PV1, Partington stands, Grado SR125, Kimber I/Cs, QED speaker cables, R.A power cables.