The reason why we chose these two in-ear headphones was not only due to their popularity, but the fact that they are the two most common out there in stores and reasonably priced. Other models and brands are harder to find and have a hefty price tag, and for our purposes, you can walk in to your local computer store and probably pick up either of these two; the same goes for online retail sites. The next model up to Sony's in-ear style headphones (MDR-NC11) jumps to ~$90, and from there, other in-ear headphones just continue up the price list.
There are cheaper models such as the Sony MDR-EX71LP ($29.99) and the Sennheinser MX-500 ($14.82), but they are more price-oriented models. For those looking for a mid-line model or for those MP3/audio enthusiasts, the Apple In-Ear headphones and Sony's MDR-EX71SL are a nice crossover that is supposed to supply quality in tandem without making it a ridiculously pricey purchase for either group.
Click to enlarge.
Click to enlarge.
Package-wise, the Sony MDR-EX71Sl comes with three different sizes of in-ear earpieces, an audio extension cable, and a carrying case. Apple's package is much simpler in design, and reminds us of the company's flare for the aesthetics. They waste nothing: the package itself is the carrying case, which includes a spot to hold the headphones and the two other in-ear earpieces of different sizes.