I will asume English is not your first language, so ignore the grammar.
I think you are tackling this from the wrong angle, that question would be almost impossible to answer.
First look at your budget, how much can you afford to spend, there is no point in recommending a $1500 computer if your budget is $500.
There will be lots of people that will have different opinions on the same brand.
So if you were to say how much you want to spend and what features you need, I'm sure you will get a reasonable response.
Apart from your studies you may want to be able to play some games, watch tv, record video and so on.