i have the xb400, i am no audiophile, i want to start getting good headphones etc, but in my opinion $40 in Amazon... Not sure you can beat that. The bass goes super deep, playing bass boosted songs from the BassBooster2 on youtube (you can download songs from his channel in 1400kpbs wav files) the headphones sound amazing. Rap/hip-hop, dubstep, electronic, and some pop is what i listen to. these headphones dont distort unless there is too much bass. Normal songs barely have more bass unless its intended too, and bass boosted is... OMG cant imagine what the xb500, xb800, and xb1000 sound like...