After several hours of listening with this FiiO HS2 switch, I returned the $749 HiFiMan HM-801 under their 30-day refund policy. I'm still using my $249 Sony PCM-M10 as a portable transport (card reader with 96/24 capable DAC to Line Out). For my gear, my ears, my subjective tastes, the HM-801 Line Out could not compete.
This $299 TASCAM DR-100 MkII recorder was also returned:
Now I'm waiting for the $1000 Sony PCM-D100 recorder to be released in the States, but I'll return it, too, if its Line Out can't outperform the sound of my PCM-M10 Line Out. Note that there are people out there who say the D100's predecessor, the D50, doesn't sound as good (via Line Out) as the inexpensive PCM-M10, but I'm hoping the D100 Line Out can entice me to part company with $1000.
All that said, I've actually seen people just roll their eyes at the suggestion they listen to my Sony PCM-M10 Line Out to various amps. Their negative expectation is that anything not discussed ad nauseam here at Head-Fi isn't worth the time to audition, especially if it sells for only $249.
I get similar reactions to my use of the TBI Millenia MG3 speaker amp to drive the LCD-2. "Oh, it's just a class D chip amp? Never mind..." Yeah, never mind that it sounds much better than the Burson Soloist I sold - an amp that gets way more ooohs and aaahs than it deserves, in my opinion, having spent 7 months with it, trying to figure out what all the fuss was about. My CEntrance DACmini CX does a better job with my LCD-2 than the revered Soloist, but the DACmini CX is yesterday's news.
Going off topic, but since we're discussing expectation bias, the TBI Millenia MG3 is my pick as the poster child for negative expectation bias (it spectacularly outperforms expectations):
Quoting John Hoffman's Positive Feedback review at http://www.positive-feedback.com/Issue67/tbi_millenia.htm
My "transportable" rig: http://www.head-fi.org/t/633511/pictures-of-your-portable-rig-part-xvi/7050#post_9857369