As a dac, no not yet but i will be, anyway i got it for £25 as the seller accidentally sold it to me in a used state, bonus.
I have a cowon s9, the fuze through the line out spanks it, could have bought a d2 but it's hefty and old tbh.
Plus my cans are low impedance, ideally you'd want to match it with a low impedance amp which the e11 isn't, but the e7 is.
Otherwise you risk changing the sound signature.
But the above is moot, as i might be buying an ibasso p4 warbler anyway, the e7 was just to dip my toes in to see if i liked it.
And i do, using a dedicated line out really brings life to the fuze.
The nexus does have a cracking hp out, i would really like to find out what dac they used, it might be texas instruments.