I mainly listen to indie folk (Sufjan Stevens, Fleet Foxes, Iron and Wine, etc), indie rock (Death Cab for Cutie, Band of Horses, The Shins), classic rock, some punk rock, and some reggae-rock (Rebelution, Slightly Stoopid, Iration).
Im not really sure what portable means in these parts. I'm not going to be taking this rig with me wherever I go, but I would like it to be portable enough to take from the computer on my desk, to my iPod in my room, and occasionally in the car with me when I travel. It doesn't need to fit in my pocket, but I don't want something that can't move around with me.
Also, Im a bit skeptical about my 3G iPod touch. I've heard some bad things about it's DAC. If I bought an external DAC, would that fix all quality problems of the iPod, or are there other quality problems with it that I am not aware of? Also, if I did buy an external DAC, it wouldn't be compatible with my computer would it? Or is there can I use different adapter cables for the same DAC (i.e. be able to plug a usb cable into the same DAC I would plug my iPod cable into)?