Officially (at least that's what I know of it) the raw DSD stream can't be output from an SACD player (it's not allowed, whatever). But, from some players it can be picked up, and the Oppo (don't know the type) is known for it. It you Google around a bit, you will find it.
You'd have to take up the solder iron though ...
Btw, I don't own an SACD player, and there was nothing in my mind that planned to use the DSD input. But about theoretical options ...
Peter
HDMI from versions 1.2 and up can transmit DSD securely with HDCP (High-bandwidth Digital Content Protection).
I just asked to Oppo if its players can output via HDMI pure dsd signal, I am waiting its response. I have read that the DV 980HD can do it, but the DV 983HD converts DSD to PCM, I don't know about the DV 981HD model that I own.
Also there is some Pioneer, Sony and Denon player that has a SACD digital interpace call iLink, that it is firewire, but I have read that Pioneer convert DSD to PCM.