Hello Anupam,
I do agree with the webmaster and the first thing first, you better decide what mostly you going to use your laptop. There are various configurations of the laptop and one should decide by their usage. If you are game boy you need high graphics and all. If you are students and just want to buy for education purpose then Dell will be your nice choice with 1GB RAM, i2-i7 processors.
Regards,
G1