Smartphone for the audiophile?

I had the iphone and am now on the second generation of the Droid.
The Apple device sounded better, but I have hooked up the Droid to my main rig via USB and am surprised at how acceptable it sounds playing mp3 files.
I don't know why anyone would use a phone in a high end system anyway, but if that is what you intend to do, I'd go Apple.

Richard, I have no intention of using a smart phone as a source in my main rig for any form of serious listening, but would possibly use an app to control other devices. Can you get digital output to work with your rig from your droid phone? I thought this can be a problem. What phone are you using?

I use my Android phone to control J River Media Center on my PC using the J River developed app Gizmo. It does not run on iPhones. There are iPhone apps for this, but not from J River. So, you may want to narrow down just what you want to control and see what apps are out there for the major ones.

I had an HTC Arrive which was basically a Windows phone + Zune. It bettered the iPod touch for fidelity but my son will never let his iPhone 4S out of his hand for me to compare :<). Note that processer power and battery power are the key limiters for both Apple and Msoft portable device's audio fidelity

As an update to this thread, I recently purchased an HTC One which shows promise so far and works much better than my last phone.

Beautiful fit and finish to the screen and the enclosure and two, front facing, stereo speakers vs the iPhones single rear facing speaker.

More importantly, some forums suggest that the micro USB port will export digital audio and/or video easily?

It seems the typical phone user does not care, but for audiophiles this could be a breakthrough vs Apple's proprietary interface?

Not easy to find a micro USB A to mini USB B cable without using adapters and more than one cable. And I am not sure on the exact spec if anyone might know? Would this be the same as a "charging" cable with micro on one side and mini on the other?

But otherwise it seems you could go from smartphone out to a portable, external DAC such as a FiiO E17?

Look forward to any thoughts or ideas.