as for me it does not matter what sort of lappy vendor u opt for, but it always matter that what is it configuration.
as u said u are a science student u; need to work with certain software like matlab, scilab, pearl, latex which need faster processor so go for i7.

thanks , sir/ mem
I have got what u want to tell , and for that i am again saying thanks
i will be helpful if u give me some sort of guidence and the way to sail over the sea .
please stay contact with , my mail id
[email protected]
jagamohan padhi(pappu).............................THANKS

This is a question which does make a home in every body who are doing there post graduation.
what to, when to , how to do after the complition of the postgraduation , most of the people want s to go for job but it is not possible for everyone that they can get a job of their wish, because the most job sector ask for the technical degree and professional degree. so people has to adjust with the less salary and squeeze their desire.but this is not for all the case , there are some case which make u better than the professional course and make u able to get a sound salary job, one of the sector is the government sector examination and much more..
but for that one should be highly conscious about the the latest availability of the resources and the oprtunity.
so we need to take attention before it is too late , about our career . and oppertunity that we have.
or we can go for the net or gate examination for doing m-tech and phd which keep u on the top of the academic hill, and enhence the opertunity and the career prospectus.

the is such that every body first ask about what bulk of money is required for the course rather how best it is, how reliable that to you, that is fine and have create practical sense in most of the students and there parents mind.
in INDIA education is been expensive as a car, for a std 1 child parents needs to spend atleast 50000- 60000 bugs per year which is much more than everage income of people dwell in rural off a year
so for doing postgrad o r above it is mandatory to know the best part of the world which lead u into ur destiny which can only possible by the help of bodies and studies.
thanks
pappu