Fzfan - I would encourage you to continue researching non-os DACs. You can learn more about the design philosophies by reading information on the Audio Note and Sakura Systems (47 Labs) websites. I bought an Audio Mirror D1 non-os DAC. At less thn $500 is a steal. Read my review on the mods I had done to it. There are many other fine non-os DACs under $1000. Listen to as many as you can.
