Personally, I preferred the HD58X to HD600 (marble), HD650 (Ireland), HD560S, HD400. Unbeatable headphone at that price, for me.
Almost same FR graph than the new HD660S2 (see solderdude comparison at diyaudioheaven).
At about the same price, or slightly above, I liked the Deva Pro wired very much.
I had the HD58X and still have the 660S2. Frequency response graphs tell only one side of the story. They sound nothing alike and the HD58X pales in comparison to the bass response and detail. the 660S2 is worlds above the HD58X to the point I had no issue selling my HD58X.