So after a lot of experimenting with the EQ, I found out that the DAC/AMP have nothing to do with what I was hearing. They just revealed what I later found out to be a pretty grotesque 10-12khz peak on the K702 frequency response. After I EQd it down, the harshness I was hearing is gone. If I switch back to Oratory's preset, it just sounds ridiculously bright and impossible to listen to, so I'll no longer be using that. I'm now enjoying this combo very much, thank you all for helping.