Gary I have been listening to an i-book through a firewire M-Audio Audiophile (using it as a digital through) to my Quad 99 CDP the one with the digital inputs retailing at £900. I am very pleased with the results and cannot find much difference (sometimes none) between this and listening to the Quad on its own. I thought of you because I know that you have not been fully satisfied with your current setup and that you were thinking about saving up for another Naim. In a recent bake-off the Quad did very well against the Naim, I think having more groove, and thought that this could be a solution for you to use as a DAC with the backup of also being a conventional CDP. Works for me, so I thought that I would share this with you, but have a feeling that you are a little more critical than me in what you are looking for. Dominic