+1 on both of the above posts. The Pro 500s sound great, look a bit goofy, and are a misfire in terms of their market. I use them often despite their looks -- and funnily enough, they are a stay-at-home headphone for me because they simply aren't durable on multiple fronts.
Yamaha should have gone with a mix of leather and metal instead of pleather and shiny plastic -- then they would be compared to Momentums and B&W P5s and other luxury headphones that have a similar sonic character. This would be closer to Yamaha's roots, anyway -- think "musical instruments" all the way.