Headphones with inbuilt mic @ Rs. 6000 [Kolkata]

I need a headphone within Rs. 6000, with inbuilt detachable mic (or similar attachment like Siberia V2). I'm a hardcore music buff. I listen to retro, hard-rock, Metal, Goregrind (you get the drift??). I will use it to chat online as well as play games!
Please suggest.