A lot of people have complained about the Fuze+ having poor controls, but that it's better with Rockbox. Otherwise AFAIK they're all the same in terms of sound quality.

They both use Qualcomm chips with the same DAC, I believe. I have the S3, and as far as I can tell it's decent. At low volume I can hear noise and hiss through my Superlux HD668B, but maybe that's a consequence of me using CyanogenMod. The volume gets quite loud (in fact even the lowest volume...

FauxSound lets you adjust the headphone and speaker gain if you have a compatible kernel, nothing more. You actually don't need the app, you can set the kernel parameters manually if you know where to look.

I'd say both are quite good. The Nexus has a Wolfson DAC, which is well regarded; I think the bigger factor should be whether you prefer iOS or Android. (The Nexus 7 has a Realtek DAC and is known to be quite poor - the Nexus 10 is much better) See...

Yeah, I looked for higher impedance headphones but in terms of IEMs I can't find anything in my budget. The Brainwavz M1 have 32 ohms, would that be enough? Also, could you point me to an example of such a divider? I looked on Google but what comes up doesn't seem to be related to audio...

Thanks for the link - unfortunately CyanogenMod doesn't support USB DACs, but that thread links to the possibility of it working... I'll keep researching that. Yes - I've been considering the Clip. I simply like the interface of my phone better. But that is the option I will most likely be...

My dilemma is that I have a U.S. Galaxy S III, and I don't know if this is a defect or not, but it produces a lot of background noise at low volume (the only volume level where it's even remotely comfortable to listen to, the GS3 is a really loud source!). The problem isn't always present - I...

I actually am in the exact same situation as you are, and I've been looking around as well.   http://www.head-fi.org/t/575409/can-a-portable-amp-work-as-an-inline-volume-control-to-reduce-volume says the Fiio E6/some other amp can be used as a decent volume control - it is another thing to...