Tvad...Strictly in terms of audio quality, DVDA and SACD are comparable, and both are superior to CD (IMHO). If SACD is "worthwhile" for stereo, so is DVDA. Buy whichever discs have the music you like.
However, for DVDA, and to a lesser extent SACD, not using the multichannel capability is like spending a lot of money on an expensive SUV, and then only driving it on smooth roads in 2-wheel drive :-)
However, for DVDA, and to a lesser extent SACD, not using the multichannel capability is like spending a lot of money on an expensive SUV, and then only driving it on smooth roads in 2-wheel drive :-)