Schwilly,
SACD doesn't use 24bit/192khz it uses 1-bit/2.82mhz, also called direct stream digital since it's not related to PCM at all (it doesn't decimate).
DVD-Audio is the only consumer format currently 24/192 capable, but the software required to burn a DVD-Audio disc (without gaps between the tracks) is very expensive 2k+
Soon though we will be there.
peace, chris