I have the gryphon signature for my main speaker and the Gryphon S100 for the center speaker .Fast detailed no grain or harshness absolutly superb at least with my speakers.JM Utopias The Spectral are way too harsh for my taste I do listen to primarily classical music. I would venture a guess that for Rock etc. they may be fine. The Rowland are nice but do not have the speed and slam.
