Dell has a solid reputation when it comes to business laptops, and the Dell Vostro 3555 is a good indicator as to why.
The performance is just what you need from a reliable business machine while a couple of extra touches make it a pleasure to use. Moreover, the asking price is appealing to anyone shopping on a budget.
For a business machine, nothing is of greater importance than the usability. You're going to be typing a fair amount of reports, emails and other correspondence so it's vital to have a solid keyboard.