My current CD/DVD player is the Meridian 596 which can be plugged into the 861 nicely to produce some kind of a musical performance and the expected excellent surround sound quality. Or its 192-khz analog output can be plugged into an analog preamp such as the SP2, while its digital output would go into the digital surround sound of the SP2. However I am think of the long term, which is CD-quality music stored on a hard drive. So eventually I would have to buy a DAC capable of wirelessly receiving the musical signal. I am not going to buy any wireless equipment nor any DAC until the technology can achieve "that" level of audiophile performance. But you know the technology is only a few years away. In short, any analog preamp is still needed, unless I don't think straight here.