Raysonic CD 128 hands down nothing else comes close. The Doge 6 as mentioned above is not a bad suggestion, and you can get it cheaper, but I live 5 miles from pacific valve and have tried many of their units, this one is nice, but nowhere near the build quality and parts(although pretty good), and not as versatile DAC convertor in the unit as the raysonic.. The Raysonic has Upsampling optional via button, so your not stuck and can hear HDCD also, which is worth it over the Doge.
The raysonic is Superior to almost all machines in build, it has Balanced XLR which is not on the Doge,
It only takes 4 tubes opposed to having to get 6 like the doge, also the 4 tubes are all accessable without opening up the unit... user ergonomics far better
The Raysonic is a Top load vs. drawer, less mechanical parts, making its operation quieter and of course more reliable in the end....
Raysonic, Also has american Dealer Quest for sound which does warranty work, and Canada is the origin of the machine and easy to get customer support on it, the Doge is chinese, and anything thru pacific valve they do not support direct, and offer very short warranty time 90 days I believe, and all stuff has to go back to china. I say this out of personal experience with them.
Also anything from the pacific valve chinese knockoffs are totally unknown brands and suffer badly from this on the used market... Raysonic holds high value.
Take a look at raysonic here, you will be very intrigued to try this machine before you go to look any further. see link
For 6 moons endorsment, and very detailed review, features, with value on this machine.
http://www.raysonicaudio.com/reviews/6moons_audio_reviews_Raysonic_CD128_01.htm