Well, my PS3 is one of the models that does not play SACD, so that's a non starter.
From what I read on the internet, there are internet download services producing 96/24 FLAC files for download.
I think I will investigate these instead and keep the DVDA and SACD just as occasionally played discs.
Anyway, now I have had some time over the break I have established that the DAC in the ipod classic/ipod dock produces quite a poor sound, so I am going to have to look at this issue first.
The files are fine, it's just that when listened to via the ipod dock, the sound is well, to my ears, not very good.