I'm having troubling finding a replacement for my headphones. I had the apple in-ear headphones and they've worked well for me but after a couple of years of wear and tear they need to be replaced. I found that Klipsch S4i is well reviewed and received. It employs a single driver, where as apple uses two drivers. It seems the conventional wisdom is that more drivers equals better sound fidelity, provided the use of high quality magnets are being used. Any opinions on the Klipsch S4i, especially in light of the S4i. How's the construction of the S4i, better then apple's. I hate to spend 100 bucks every other year on headphones.