Lately I have seen what are being advertised as "Full Digital Receiver/Amplifiers." I have no idea what this means. The spec sheets on them don't look any better. They are cooler, quieter, and smaller, but is there any advantage sound-wise? Fundamentally, what makes a receiver "digital"? You're going to have to use a DAC at some point, right? I'm extremely skeptical of this stuff. Somebody set me straight!