I'm currently installing a Nexus 7 tablet (USB audio out) into my car, to use as a head-unit.

Given that DAC technology seems to be constantly changing, I feel overwhelmed when selecting a USB DAC to input into my signal processor / amps.

-Audio files will be 24 bit, 192khz.
-Drivers will need to be compatible with Linux (Andriod tablet.)
-My signal processor has stereo RCA inputs.

Can you recommend a suitable DAC for this environment?

Previous threads have recommended the ES9023 DAC:

However, I like this DIY DAC solution (DAC SABRE 9023 + XMOS2):