Hello i think i'm going to be flamed for this, and yes i know this site is more about pc hardware then mobile :) but just wanted to give this a change.
There are a lot of audiophiles who are very interested in proper mobile phone audio quality comparison for example Galaxy S3 (with Beats Awesome MOD), iPhone 4S/5, HTC One.
Personally i would like to see 2 charts: 1 for testing audio quality using special tools. 2 for using your own experience, do you like it or not and so on.
I'm personally not getting my hopes up for this, but just wanted to give this a shoot.
One way to guage Audio quality is by finding out what audio chips they use. I know my i9100 uses a Yamaha chip and its sub par unless you install some kernal audio mods. only then does it get decent.
Im an audiophile too. So my Decent may be someone elses "Great"
From my understanding the phones just gave off too much interferance to get audiophile grade output. But there are dedicated FLAC players that are much bettter. But I would imagine theres a program in which you could plug your phone via headphone jack into a mic input on your pc and be able to see its frequency responce range, bit/sampling rate, and power output if you were playing a relevent file. Maybe all it would take is a simple recording program as long as it showed you the stats of the audio source. I don't know alot about recording software but it would suprise me if most the recording programs didnt have that feature.
Well I'll start off by flaming you just as you predicted. If you consider the Beats Mod to be awesome, and you even consider the iPhone to be audiophile quality, then you probably aren't an audiophile. Second, what you really want to get is an Android phone with USB host capabilities and use a USB DAC with it for optimum quality. GSIII can do this, it works with FiiO E17 for sure. (kinda low end, but still better than anything built in to any phone) and I'm sure it works with others as well.