ADSL + Router for MTNL connection

Hi,
I am looking to buy a wifi router with modem for my new connection which is by MTNL. I am confused which to buy can you help me decide?

My house is about 1400 to 1500 sq feet.

Price is not a concern but would prefer to keep it under 10k.

I was looking for
(1) Belkin N600DB wifi + modem.
(2) Cisco linksys X2000
(3) Cisco linksys X3000.

Please suggest which of these is good to cover my home or is there any other router I can purchase to cover my house.