Anyplace in Bangalore where I can try out these?
I'll only comment on the comfort factor of the headphones. I've used both the ATH-M50 and the Sennheisser HD555.
The Sennheisser was extremely comfortable and could be used for long hours without your ears getting hot. The ATH-M50 on the other hand i couldn't use for more than half an hour to an hour at a time. My ears would get extremely sweaty and hot.