I'm going to chime in to say that the ONE.3 is one remarkable amp. I have it set up with a pair of nice monitors in the mid-field, and I can honestly say that nothing is missing, top to bottom -- the top is clean and clear and the bass runs strong and deep, not overblown and one-note-like as I've heard from some other amps.
I actually watch a lot of movies with this setup, and dialog is perfectly clear, soundstage is solid, dynamics are impactful, and when a musical passage begins I am blown away not only by the tone, but also by the black space in which the amp allows the music to bloom.
If you pick one up, you are getting a whole lot of amp for the money, and will have plenty to enjoy. I will also add, as I have mentioned in a previous post, that Seth provides outstanding support should you ever require it.
I hope you consider trying a ONE.3!