The Sennheiser's are a good value budget headphone for portable use and they put in quite a decent performance.

They serve to be more than adequate for traveling with, although they do gather a few odd looks as they are a bit larger than standard portable headphones, but hey if they sound better than ear-buds who cares?

I tend to use them mainly with my Minidisc Walkman, as they are ideally suited. The Bass response is somewhat limited as you would expect with such a small driver and the treble is a touch bright but I think that adds to their character. 

When purchasing these phones I did listen to the next pair in the series but they seemed to lack punch and drive when compared to these.

 SENNHEISER HD470 Features:

• Ultra lightweight hi-fi stereo headphones
• Very wide frequency response
• Self-adjusting headband for optimum comfort
• Duofol technology virtually eiminates standing waves
• Lively and natural sound reproduction with full, warm bass
• Hypo-allergenic earpads
• Lightweight copper voice coils for linear sound reproduction with minimum distortion
• Robust, single-sided connection cable made from reinforced oxygen-free copper (OFC)