There has been a lot of earbud talk recently. Any recommendations on brand/model in the $20-40 range for backup audio/video monitoring? I want something comfortable, durable, and reproduces the sound without emphasizing base/treble? Will be used mostly to monitor dialog?

I've got my eyes on Sennheiser CX300
http://www.bhphotovideo.com/bnh/controller/home?O=cart_accessories&A=details&Q=&sku=426862&is=REG

For earbuds I am very partial to the Sennheiser IE4. At about $50 I haven't heard anything as good in this price range.