Hi Graham
I kinda miss my MDA700..the recent firmware update to the C48 has put my system into a bit of chaos. I had moved to a Linux based music server, VortexBox, and it's not playing well with the C48. My Win7 PC using JRiver plays fine, but I really don't want to go back to a Windows based music server. I've said it before, I think the 700 is a really sweet DAC. Forget the fact that it only does 16/48... It really sounds NICE
Problem for me is that I need a USB DAC. Hopefully I get that VorrteBox to play well with the C48..I may reload it this weekend. I know that the backup & restore work well, it just takes a l-o-n-g time.
Take Care
Chris