Wonderful review. Very informative and detailed. I can see the passion you have for this unit
I only just missed out on the drop. But tbh the exchange rate isn't the best time to by this from New Zealand.

Nice review.  I was so tempted to pick one up during the drop, but I already have too much "stuff" so I restrained myself.  Looks like I should have just gone for it.  Does seem like a great deal, and I have a lot of the same headphones you do... HE-400i, HD650, TH-X00...
 
Oh, and it's Bifrost...  

Yep. I love mine. It's driven my HD800 so well that I'm thinking of selling off more expensive gear. Sounds great with the Audeze cans, too (LCD-2, LCD-X)

fjrabon is a pro typist.  excellent source.  makes all my cans sound they way they should. grace is genius.

Awesome read. Good work all around.

Could this replace my Peachtree DAC-ITx and Burson Soloist combo for my LCD-2 and TH-X00? Thanks!

I can't comment on how it powers the LCD, but with the THX00, without hesitation, yes.  To me it's an ideal amp for the THX00.  When Will from Massdrop was helping to develop the THX00, the m9XX was exactly what he was using.  I think it would have plenty of juice to power your Audeze, but I always hesitate to say without knowing how loud you listen or being able to hear the pairing myself.  The only thing I've found that it won't power well is the HE-6, which, I mean, there's only a handful of amps that really can power that monster correctly. Heck, I think it even powers a DT770 600 ohm well (though some people who prefer to BLAST their music might not love the pairing).  

I concur entirely with your review, using some of the same headphones you mentioned. I also feel the same way regarding low impedance headphones- "easy to drive" does not mean well driven. The Fostex TH-X00 are an excellent example of a low impedance can that needs a good amp. It pairs very well with the m9xx and beautifully with tube amps that can deliver adequate current. 

what a read ! like I was there ! thanx a lot