need router for bsnl broadband

i need to purchase wireless router for my bsnl broadband.
need stable connection, good coverage(2 floors)
budget is below 3500.

You can get a Netgear Wireless-N 150 Router for a price of Rs. 1500 approximately. It has a broadband usage meter monitors traffic volume. And their free technical support expires after 90 days. It has wireless n at 150Mbps is still at least three times faster than the previous 802.11g Wi-Fi standard.

thanks zachary.
but will it give my required coverage? considering interferences walls etc.
have you used it urself?

The budget you mentioned is not really enough if you are looking for a router for two floors. Because you need a better router which can penetrate properly between floors. See the below list. This are the best wifi router for home and office use. You can find a lower range also.
Top Home Wifi routers

• Asus RT-N16 - 6,700
• Buffalo WZR-HP-G300NH - 4,900
• D-Link DIR-685 Xtreme N Storage - 13,000