Not angered nor upset good sir, just wondering if you'd weighed the all features and benefits of each before buying. When I looked at the specs for the Parasound Zamp3 I didn't see (overlooked?) mention of a line level sub output. Also, if I were filling up a desktop where space is at a premium, a vertical standing amp would hold appeal. The DAC on the NAD is pretty darn good, don't know anything about your unit so I apologize for my ignorance.