the Benchmark will wipe the floor with the Pico anyday. it's not portable (AC power), but you could backpack it as a desktop league solution for use at home or work. Plus it's a Balanced source.
if youre into detail, you will definitely like it because it has plenty.
You might also add Lavry DA10 & twisted pear OPUS to the list.
the DAC1 is the best money ive spent on this hobby. i admit that i thought the built in headphone amp was only mediocre. I've come to realize that the entire package (individually or all together) is a very remarkable piece of equipment made for professional purpose.
I have the Opus arriving this week. I dont think it has a chance against the Dac1, but well see.