buying help

Budget (in USD): As cheap as possible but probably 300 USD. If something truly better then 400 USD. I am buying this in America so a direct link to the best option is appreciated. Are you open to refurbs/used? List one refurb option just in case. Priorities Performance. Battery life isn't that...

I am a Mechanical engineering student. I want to buy a laptop that will be capable of handling basic CFD simulations, FEA and CAD along with all other casual work. My budget is upto Rs.60000 in India. Can anybody please suggest me some good options to choose from? If possible please also give...