Having had one of these the last several weeks I can thoroughly endorse the conclusions here. Exceptional headphone amp.
As an HE-6 owner I will mention that I prefer the balanced output, and looking at Head-Fi and a few other places I think this is the general consensus in relation to the preferred output into this particular headphone.
So far this has yet to put a foot wrong for me, it pairs wonderfully with my HD800 as well as my T1, and in the time I had auditioning it with the stores LCD-3 it seemed like a nice pairing there also (disclaimer: take that with a liberal grain of salt, I've not heard the LCD-3 before so have no point of comparison there).
Would be very interested to hear anyone's impressions on the Taurus MKII Vs the GS-X, so far I've seen only a single opinion and they felt that the two were very, very similar.
Now let the DAC shopping begin!