What it says. I own (2) EX-29s (broken), (1) HD-280 (bad cable), (2) MDR-7506 (one has busted ear pad), and (1) K-240s (my personal headphones). So this discussion is for cans under $100, preferably $25-$50. I like my current cans for different reasons, and want to repair/replace them if possible. I also want to have a 4-pack of cheapos to use to save on the wear and tear of the good ones. These will be used EXCLUSIVELY for tracking, some overdubs. Some overdubs and other monitoring will be done via the above-mentioned headphones. Remy, among others, has lead me to look into this, and I hope it will provide a reference for others looking for inexpensive (yet isolating) headphones for tracking/overdubs.