Hi, Captain,
I certainly agree with Nick250 that headphones, like speakers, should be listened to before buying. What I like, you might not.
But I've found that if I like a certain speaker model, I'm likely to like other speakers made by the same company.
I haven't listened to the Sennheisers you're asking about, but I love my Sennheiser PX 100 headphones. I didn't like the ear buds that came with my iPod, so I upgraded. What a difference!
I liked my 100s so much that I bought a pair for my parents, but of whom are hard of hearing (my dad's almost deaf), when I got them a portable DVD player this year. They love the Sennheiser headphones, and my dad can hear the DVDs well. (I got a stereo-mono adaptor plug for the headphones, so he could get both channels sent to both ears. Since he's completely deaf in one ear, he can still get all the audio in his other one.)
Have you checked Amazon for user reviews of the set you're interested in?
Chris