Get the AC RYAN I have one and its amazing and it even bitstreams HD audio which the WD doesnt.
It does not say it on the specs, but did a back-up of a free sample blu-ray I got and it had master audio on it, and my amp lit up.
Also firmware is more regular on ac ryan.
Yes it does not have a wicked GUI like WD but they are soon to get one, and what do you want style or function?