Thank you so much! That helps a lot.
So for the ipod setup, will that sound really bad bypassing the DAC? I bought the LOD because I heard you want to avoid the ipod's converter. Will the LOD and amp sound better than the ipod's headphone jack into the amp? Or did I make a mistake buying the LOD, thinking I could use the D4's DAC?
Every one of your questions can be answered by plugging A into B, listening for an hour or so, then plugging A into C, listening for an hour .....
Rinse, repeat, then come back and tell us which combination YOU like best. Thats the only opinion that really matters, and you already have the kit - win-win, really.