Octopo:Benchmark DAC1 connected to an iMac by optical fed by a Thecus N200 on the network. In turn it is connected to a Nait 5i with RCA and onto B&W 805s with Chord Epic. I concur with all of the above adding that this DAC is a proper studio DAC and has no real character - it is as transparent as they come. Timing, detailing, soundstaging and dynamics are top notch. I would however try and sample a couple more DACs before you put the notes down all the major ones offer a trial period. I tried the Stello (not the Signature) and the Harmony before I settled on the Benchmark though I now wish I'd tried the Lavry DA10 and the Stello Signature, though at the moment the Lavry has to come from Germany because they have no UK distributor.
Very interesting setup... especially since I'm considering the Nait 5i as a possible amp for use with the Benchmark... I've heard and been very impressed by the B&W 805S (if only I could get the 804S for that price, as I really want towers)....