My Apple headphones that came with my iPhone 3GS are starting to take their last breaths. The left one is much quieter than the right one and in fact, they are both pretty quiet (have to use +90% volume to hear anything while ~60% used to be fine. And no, I'm not deaf as 60% is fine with other headphones). I would like to stay under 50, preferably I would like to pay around 30. I really like the navigation buttons in Apple headphones so I would like my new headphones to have that too. I'm looking for something similar to the Apple headphones in terms of form factor (no Porta Pros or something similar) but hopefully with better sound. I mostly listen to metal (black, death and trash) if that matters.