Sennheiser HD598Cs. Be careful though, the backs and pads are micro sued. Gets dirty really easily. Has almost the soundstage of HD5xx headphones (within 20%), extends down to 30Hz, clear, comfy, no need to seek out ear pad adapters and after market pads or mods (unmodable anyways).
Thanks, I was looking into them. Upon seeing the reviews, most said it was slightly muddy compared to it's open back. But it seems they would be a good buy in their price range.