You didn't mention what Type you want. Do you prefer cushion type or open-air type foam that doesn't enclose the ears? For portable player or home stereo?
I can recommend one from my experience and one that I've heard great things about and plan to buy some day:
Mine: Sony MDR-7506 Professional studio monitor head phones. I've had these for around 12 years, replaced the pads recently and they still sound fantastic. They are the type that cover your ears and block out some noise due to the cushioning. These have a long spiral stretch type cable and are not really suitable for mp3 players for that reason, they're good for home stereo usage.
Sennheisers are good and you can get a bargain on some of their mid-level ones which are quite good.
The one I want to get next is the Grado that goes for around $100-$130 on sale. I forget the price but it's in that range. I know someone who raves about these, and also the reviews are solid.
For my mp3 player I found a pair of JVC's at Ross Dress For Less, for $5 - they were probably about $15 originally - and they fold up for easy carrying and they sound great in places where it's noisy anyway and you're not doing any demanding listening. I bought 3 pair after I heard how good they were, so if I break or lose a pair, I'll have another.