As Kenneth stated, Sennheiser products are very good for sound quality, there is a range of products from somewhat cheap to very very expensive, read some reviews, and find out what you like.
The Professional Sony studio headphones are great, at least the ones I've used.
Keep in mind high quality professional headphones commonly have high ohm loads, and wont sound good unless there is some type of amplification involved. Some Asus Xonar sound cards have build in headphone amps, and can properly drive high ohm headphones.
You might have an audio equipment dealership in your area that would let you sample some 'real' headphones. Reading reviews can't really show you what quality audio sounds like.
Most "gamer" headphones are overpriced and poor quality, especially compared to quality cans. My turtle beach x12's are comfortable, and flashy looking, but there audio quality doesn't come close to the nearly $90 that I spent on them.
Just please, please what ever you do, do not get 'beats'. You're welcome.