I just stepped up to a new HT system. I had a two channel system and was using a Cambridge Audio DAC Magic 100 with my NAD Amplifier. I basically used it with my iPod. It worked great. Now that I have this new HT system I was wondering about making use of the DAC. The HT processor I now have is a Marantz SR 7007. My question is two fold. First does it make sense to usw a DAC with this amplifier? I am not even sure it the Marantz already has a DAC on board. I have just had it over a week and am still learning. This thing is complicated and for me has a steep learning curve. Any help would be appreciated.