Been testing the fake Fiio E6 for a couple of days, and i think it really isn't that bad. Well i don't of course know how the real Fiio E6 does the job but... I bought it just to get more bass and volume when listening my Beyerdynamic DT 770 Pro's (80ohm) from Samsung Galaxy S. And it does exactly that, more volume, more bass, maybe slightly better sound quality, more clarity/contrast, maybe. I think i'm gonna just let it be, I don't have the time and nerves to return it and all the fuss. Would probably take months to get a new one.
Why bother using an amp? Get voodoo control and amplify from the phone. Galaxy S is an amazing device for that.