I have the Metrum in the system now and am enjoying it a lot. I have not A/B'd it against the EE Plus as I'm waiting to break it in properly. I also just added a new Pre-Amp into my sytem, so the enjoyment factor could be the Pre or the Metrum or the synergy between them. Right now I can say that the imaging, sound stage, and overall tone has never been better in my system.
Right now I am using a Mac Mini-->Twin Impact Dac/Converter (Dac off) w/ Kora PSU-->digital cable-->Metrum Octave-->Allnic L-3000A Pre-->Art Audio Px-25--> Zu Defintion mk III.
I'm also trying to put together a shootout in the next few weeks between the NAD, the Metrum, the EE Plus with Sonic Frontier Opamps, and if we can find a PWD we will add that in the mix. Will keep you updated.