Thanks for the input on the Airport Express! What can make you crazy (see my post under NuForce - mfg circle) is that Steven Stone (TAS review) says the NuForce needs a speaker with sensitivity greater than 88dB, whereas Sranja (6moons.com review) says that unless he can turn the volume way up (less sensitive speakers) the NuForce is lifeless. My speakers are 94dB. I'm inclined to go with TAS, as their reviews have followed my own tastes, and the lower-powered NuForce should be more than adequate. And what sounds interesting:
According to NuForce, “The DDA-100 doesn’t require the typical DAC stage found in most of today’s digital audio products. Rather, its PWM power amplifier stage is modulated directly by the incoming signal, and the digital-to-analog conversion takes place at the speaker outputs. In effect, the PWM power amplifier stage operates as a power DAC.”