Extend your budget a little and get the TP-LINK TD-W8968
TP-LINK TD-W8968 300 Mbps Wireless N USB ADSL2 Modem Router - TP-LINK: Flipkart.com
Be sure to get the Version V2 or V3!!!
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Btw, IMO, for 1000 sq foot, the TP-Link WR740N will also be enough...