This looks interesting : If you have a PC in your setup too.
http://www.perreaux.com/product.php?idp=52
Another one that would be interesting me would be the Stello DP-200 is a DAC, Pre-amp and has connections on it that are pretty well future specced. Good shout from KS on the AV5103, If I had £800-900 and was looking for a DAC upgrade pre-amp that is one that would be on the buy now list.