Here is my first reasonable cycles rendering, the AKG Q701 Headphones.
I was inspired by the Blender Cookie tutorial"Rendering Realistic Headphones in Blender Cycles"
Modeled and rendered in Blender 2.62 RC2
Rendered in about 20 Minutes for 4096 samples
for the image size 2048x900px on two GTX 460 2GB
for comparison the old versions ->
Compliments and criticism are welcomed.