Sennheiser: HD-555, HD-280, HD-515
Audio-Technica: ATH-M50, ATH-M40FS, ATH-D40FS
it's very important to figure out what type of headphone you want, see here -
Studio Monitors: Buying Guide - for help on distinguishing between circumaural, supra-aural, open air, semi-open and closed...since you said "headphones", and not earbuds, canalphones or earphones, I'll assume you're talking about a more traditional set...