Audio Technica ATH-M50s are my favourites.
I dont own a set, I have some at work, but I like them a lot better than my HD25s and Ultrasone Pro 750s. They have the speed and control of the HD25s, the low end extension of the pro750s without it being hyped like the 750s, and much more natural, clear mids and top end than either. Soundstage and seperation is more like the 750s, but the 750s are better at that, if not by much; they make the HD25s sound congested and 1D (which they arent).