I have the HA-2 in my mobile rig, and can testify it drives the Ether Flow very well. I'm using the HA-2 only as an amplifier.
The rig is AK240 (source/DAC) - HA-2 (amp) - Wywires Platinum - Ether Flow. See the pic (taken on the deck of our rental cabin in Gatlinburg TN, a couple weeks before the wildfires hit). What I like about the HA-2 as a portable amp is - slim design, plenty of power, very quiet/black noise floor. It will also drive my LCD-X very well (but not the HD800).
I haven't heard the W8, but think you will experience good results
.
Enjoy your music!
RCB
ps. BTW
@dawktah2 I grew up in Valpo.