Just want to start by saying that all of you who have contributed to this thread have seriously helped me to make buying decisions. Thanks to the info I picked up an E17 when I first got my HE400 just to get started. It's done a great job for what it is, but I'm looking for a final upgrade.
Would like some recommendations for a "transportable" amp/dac that will be the best match for the HE400 and bring it up to its full potential. I use it thru an old Macbook Pro, iPad/iPhone, and my work PC with a poor sound card. These are some of the ideas I've gathered:
Leckerton UHA-6S MKII
O2 + ODAC
NuForce Icon HDP
The DACMini is a great sounding little unit that would be easily transportable. I've personally owned that one and I liked it a lot but it didn't have quite enough power for me. I ended up with a Grace Designs m903 and I love it.