Sorry I didn’t reply earlier - I do have an audiophile alibi though as I spent Friday afternoon auditioning DAC/amps
I was just checking the Xdp-300r’s specs and it is definitely a device I would argue
against as a home / desktop device. It doesn’t work as an external DAC fed by a computer, and it’s not powerful at all, even balanced out.
Are you sure you need a DAP if it’s for sedentary use? Another idea would be to just get a great DAC/amp, either a stack or a combined unit. $600 gets you the Ifi micro iDSD BL or the Mojo, both of which will destroy comparably-priced DAPs (and a lot of comparably-priced full-size gear).