for business this is what you need:
- full size keyboard
- Windows over mac (if you are taking a lot of financing classes) bc excel is better in Windows (ur professors will use the win version which is diff to)
- long battery life and portable
the only problem is the full size keyboard but u can buy an external numerical pad.
if ur taking marketing and not many financial/accounting classes, then u can use a mac otherwise stick with windows.
To deal with excel and all the plugins/heavy spreadsheets 8GB RAM would be nice and stay away from celeron/atom/pentium processors preferably core i3 or i5 if possible.
That's all you need.
Shouldn't be hard to find a core i3 8gb ram laptop or core i5 at a reasonable price.