I have used Koss KTX-Pro (or the Radio Shack Pro 35) headphones for years. Other the fact that they were fairly fraigle, they put out great sound for portable headphones. Koss has discontinued their line and released a new model. I am not as happy with these because they don't handle bass frequencies as well and they don't fit as nicely. What do you all use for headphones and do you have any recommendations on a different type?