Thanks guys; I know I said I wanted something bigger and more high-end, but both of those are too big and too high end. I'm looking for something smaller than, say, the Benchmark, and the more compact, the better.
I most likely plan to use this with the Zune HD, via the dock, which has an optical output. I plan to carry a small 5V USB battery power supply with the dock so that I don't have to plug it in, and maybe cover the pins that it uses to charge the Zune so that it doesn't use the power to do that. It shouldn't draw too much current if it's just running the optical output. I plan to have the DAC outputting to an amp (likely the Pico Slim or RSA Shadow), which will be driving a JH-13. I'd go with an integrated amp/DAC, but I don't know that there are any which are particularly well-suited to driving IEMs
I'll be carrying this setup (on my skateboard) to the library, the local coffee shop, etc. to use while I work. It'll always be sitting on a desk when I use it, but I'd prefer not to have to find an outlet. I would go with an integrated amp/DAC, but there don't seem to be any that are particularly good at driving IEMs. I am considering the Headroom Desktop Portable as well, but it seems all that extra power might be wasted on the JH-13. It also lacks the digital volume control that the Shadow and Slim use.
So, any other ideas?