I was looking around for a set of monitors or bookshelf speakers and a DAC or receiver to go with them, and I came across two Behringer models: the MS20 and the MS40. They're nearfield monitors with 24bit/192khz DACs, coax and optical inputs, etc. For $180 a pair, the MS40's don't look half...

First, are you driving headphones with it? If you are, what impedance are they? Second, can any of you suggest studio monitors or bookshelf speakers that can be driven directly from the 0404? I haven't enough room for a stereo reciever.