Bull, an even smaller, more economical choice is the little E6 ($25 on Amazon from Micca, which also nets you a nice splitter for running two sets of IEM's at once, which I like for ABXing). SQ is vastly superior to the stock ipod touch DAC/Amp and you can boost bass a couple of levels (sometimes nice with rock). My experiences, however, are with the L9 LOD, which bypasses the built-in DAC on the ipod, so I don't know what you'll get running it straight out of your phone jack. They supply the cable for that, but I haven't yet tried it. I'll hook it up to my BB and give Slacker/Pandora a listen later on today and let you know.
I can say that I hook up my Creative Labs Zen to Headroom's TBH that way and I don't notice a HUGE difference in SQ there versus coming straight out of the jack on the player, which says something both for the quality of the TF10's and the DAC/Amp in that player. However, one thing that the TBH does have and that I miss seeing on other portable DAC/Amps is a crossfeed, which provides a lot of fullness to the sound. I can definitely tell a difference between SQ when I turn that on/off. But that's 5X the cost of the E6 and it's a LOT bigger, and more suited for bigger cans. I'll check out the SQ with the other jack later on and edit this post.
