I actually prefer the in-ear for Rock and Dance music.
The portability is nice too.
Sound Isolating Technology
The E2c's in ear design works like an earplug to block background noise naturally. This enables you to listen comfortably at lower volumes -- even in loud environments. And unlike bulky headphones utilizing active noise cancellation technology, no artifacts are introduced into your listening experience. Sound isolating earphones are also much smaller and don't require batteries.
Speaker Type: Dynamic MicroDrivers
The E2c's speakers are constructed with studio-grade components, producing outstanding audio clarity that allows you to hear your music like never before.
Personal Fit Kit
Because every ear is different, E2c Earphones come with three pairs (small, medium, large) of disposable Foam Sleeves, and three pairs (small, medium, large) of Flex Sleeves to ensure the ideal personalized fit.
Secure In Ear Design
The soft, flexible sleeves in the Fit Kit gently contour the inside of the ear for a comfortable, secure fit so that the earphones don't fall out while you're exercising.
Low-Profile Earphone Cables
The E2c's cables pass behind the ear - out of sight and out of the way -- to provide a more comfortable, discreet fit.
Lightweight Construction
Weighing only 1 oz (30g), the E2c is lightweight and comfortable enough for any portable listening application -- packing a big punch in such a compact package.
Earphones Carrying Case
The E2c comes with a stylish, compact carrying case. The cable spool inside provides a convenient, tangle-free way to store your earphones.
Two-Year Limited Warranty
Every E2c purchased comes with a two-year limited warranty on materials and workmanship.
Technical Specifications
I like the Grado open back headphones, great value for the money.
Open back headphones have a nice airy sound.
However, if you work in a cubicle farm they do emit more ambient noise that may irritate your office-mates.
Here is a video review I found helpful:
Interested in replies that could give other community members guidance on selecting headphone types.