john.doeI guess I’ll answer my own comment...
The HD58X so far are a fun listen, but the bass is too much for studio use. I compared to my Dynaudio speakers and K7XX phones. The latter match the monitors pretty well, but the low end on the HDs is just too exaggerated. They have some lovely midrange detail, though. I’ll be keeping them as a second reference and for listening.
I got my tracking number, but apparently FedEx doesn't physically have it yet. Grrrr.