Need Headphones for pc - budget 1200/-

Hi all

I need a headphones for my pc, budget is 1200 but if the options are not there I can extend till 2000.
I will use it to watch movies and listening music and skype calls so need a mic also.

My requirements :

Comfort on ears ( I use it 5-6 hrs sometimes)
Last atleast 2 years.
sound from the headphone should not be audible to other persons who are sitting next to me, i.e sound should not come out of the headphone ( I dono if this is called noise cancellation)

I have used 3 headphones in the past 2 years ( dont remember the model numbers but its from soung magic , hp and philips) and audio is not coming for all of them from one side after 5-6 months of usage ..all are mid range headphones.

I really dono much about bass and stuff but from layman's perespective sound should be loud and clear, headphones should be comfortable , sound should not come out of headphones ..

Thanks in advance.