I would like to buy a laptop. Please give me suggestions.

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I am considering the idea of buying a laptop. Configuration is dual core processor, 512MB RAM, 80GB HDD, wireless lan, dvd combo, pen drive, 15.4" screen, price is $1000.00 (Rs.45,000). Is this a good bargain? What else should I look for in a really good laptop? Please give me your ideas and suggestions.