Help with choosing adsl wifi modem/router plz

i want to buy adsl wifi router modem and i am confused with this two

1) Asus DSL-N10 Wireless-N ADSL Modem


2)D-Link Wireless N 300 Router (DIR-615)


for me the priority is the coverage as my home is two floored and i want complete coverage.

Also i already have adsl modem and so if you guys can suggest only wifi router with good coverage within price of 2500 INR i dont mind buying it. Thanx in advance waiting for reply

I am personally using ASUS RTN13U v B1 at my home. Its a very good wifi router. One good thing is it supports USB data cards from various ISPs. I am currently using Tata Photon Plus connected to it. Working very fine. Easy setup. I am a doctor still i was able to configure it without any hassle.

It also supports Printers, portable hard disks and Bittorrent client ( can download a movie with only router on and Hard Disk connected ! ( I have never used this feature though)