True, ~200W/channel is certainly never going to be tapped by any headphone, but nonetheless
every planar I've ever seriously auditioned has sounded notably better to me from a (class D) speaker amp (vs. a SS headphone amp). Perhaps it's partly attributable to those amps' very high damping factors, which results in great clarity and bass grip?
Beyond the sound, the best
feature of my Vera Audio amp is its switchable gain (12-30 dB, in discrete 3 dB steps), which means I can use the same comfortable volume range on my preamp for headphones of widely varying sensitivity. In case anyone is curious, I run the E3 at 12 dB gain, Susvara at 21 dB, and my Shang Jr. estat (via iESL) at 27-30 dB.
So yeah, it's fantastic to have an amp that will
never run out of power for
any headphone (or virtually any speaker, for that matter), while simultaneously having an imperceptible noise floor even through higher sensitivity cans.
Getting back on-topic, my wife and I have just embarked on a two-week vacation. I've packed the E3 along with the Benchmark DAC3, and will be reporting back soon on how I'm liking the combo as a travel system. I'm definitely already
loving how little suitcase space these components take up!