Best audio quality - Apple iTouch vs iPod Classic


Hello all,
Any first hand thoughts / comments on which current Apple iPOD family product has the better DAC / overall music quality? (iPod classic / iTouch / iPhone)

I do not have an external DAC so the Wadia 170 iTransport is not an option at this point.

I've ripped a couple of red book CDs to AIFF and copied them to my iPhone, and I'm impressed with the audio quality when compared to my Oppo. BTW Each song on Diana Krall's "Live in Paris" is about 60 megabytes.

Although using an iPOD family device will not replace my CDP or TT, will be yet another source, when convenience is priority.

Regards,
alex333
I have the iPhone 3G and iPod Gen. 5 but currently, music is only on the Gen. 5. I'll be watching this thread to read other members experiences.

I do know that if you go into preferences and raise the volume in iTunes for every song, the aftermarket headsets seem to deliver cleaner sound. I have no idea why, unless it changes the way the chip in the iPod drives the load.
I have both an iTouch and 5th gen Classic, and personally cannot tell the difference in SQ, whether just using earbuds or running it into my system. I like the iTouch for long trips because I can put a couple movies on it and watch 'em. The classic holds way more music at a time, and when you're using the lossless codec, that extra storage comes in handy.
The classic is a better music replay device, IMHO, because it will hold significantly more music. The touch is more of an all purpose tool. For example, I'm typing this note from an airport on my Touch. And, I use my touch as a controller for my Squeezebox.
any a/b audio quality comparisons playing aiff sources between the two? i believe they use different dacs internally..