I also have the Desktop balanced maxed with all the Home bits and the DPS. My cans are HD650s with Steffan Audio Art cables. This rig sounds awsome. I leave the cross feed on as I don't really hear that much difference with it off.
I have stopped using USB and now run optical and coax, better sound from coax and optical due to higher bit rates and oversampling (to my ears). I run optical out from my notebook (Foobar kernal streamed to and resampled to 92K (The choice of resampling DSPs make a difference too). THis goes to an SRC10 upsampler that upsamples to 192K. This upsamples signal is then fed to the Desktop via coax. It sounds superb and blows USB 16bit out of the water for me.
All in all I could not be happier, more so when I ditched USB.
