I just ordered the Maverick Audio Tubemagic D1 Pre/DAC with tube upgrade for my son. At first he will use it as a DAC with my old Technics SU7600 integrated amp from 1976 (its still a great amp and blows away the cheap Pioneer AVR he was using). Eventually I am going to buy him a class audio CDA-258 digital amp and he will use it as a preamp as well. I am going to upgrade the opamps in the preamp and DAC sections as have been recommended in other forums. I'll give a review on it and will try it in my main system as well.

http://www.mav-audio.com/