Hello all

I am going to buy a pair of Sennheiser headphones, and since i can't afford a pair of HD600/650 then i am thinking about buying a pair of HD555. The HD555 has something called an internal "Surround reflector" which is supposed to give
"An extremely spatial sound reproduction", and they also market the model as
"Ideal for Home Cinema and music". My priorities are to get as pure and uncolored a sound reproduction as possible, without any added effects or anything like that, and i am also just going to use them for listening to music on my computer, and not for movies or games or anything like that. I would then like to ask you people, if you think that it's a bad choise for me to get these headphones because of the "Surround reflector", or if you think that it won't hurt or color the sound at all ? Sennheiser also has a little cheaper model called HD515, which don't have this surround thinggy, so i am a little torn about if i should get that one instead, but since i have read reviews of the HD515 where the reviewers said that it wasen't a good buy, since for just a little more money the big brother HD555 where a much better headphone, then i would really appreciate if any of you could tell me if this surround thinggy of the HD555 is a bad thing for listening to music only, or if you think that it won't hurt the natural sound reproduction at all ?
Thank's in advance