Sennheiser HD600 or HD650, AKG K-26P, Alessandro MS-1 with Sennheiser HD414 pads (?) and some kind of a Japanese model (Nakamichi?), or a variation of Koss Pro 4/AA.
A headphone amplifier and the HD600 or 650 are good to go, though for less money there's a lot of much better headphone models, like Roland RH-300, Denon AH-D2000, AKG K-501, K-240 Studio, Audio-Technica 900 & thousand series, Beyerdynamic DT880, DT990, DT831, etc. Sennheiser headphones tend to suck the life out of music.