I've not heard the Adcom DAC...but have compared the Rotel 1072 to the Arcam CD73t (pretty sure thats the model, their $699 version) and liked the Rotel better.
I assume you intend to use the Rotel as a stand alone player and not just as a transport?
I assume you intend to use the Rotel as a stand alone player and not just as a transport?