Hmm, interesting - planar driver headphones.
Not tried any, but I am curious about them.

Quite a good summary of the 3 different headphone driver technnologies here http://www.trustedreviews.com/opinio...gnetic-drivers

Dynamic drivers are like conventional speaker cones/domes.
Planar are like ribbon speakers.
Electrostatics are like ... err ... electrostatic speakers!

I've owned and enjoyed dynamics and 'stat headphones - very different beasts!! - but I've not heard planars.

I'll be very interested in your thoughts, Grant!

What cans have you used up till now?