Wadia 521 or Berkeley DAC

To run direct into amps. Any thoughts out there?
Check out the reviews on the Berkley at Computeraudiophile and Absolute Sound. The RAVE about the Berkley and optimum performance, they say, is direct to amp.
I have the wadia 521 with greatnorthen sound co mods and it a very good dac. I read the review that robert harley wrote and he does say that the berkeley is the best dac he has ever listen to. He even bought the review model so i guess he really liked it. The wadia and the berkeley both have volume control but the berkeley can do hi-rez. I don't think you can go wrong with either dacs.