Which is best for office use?

You need to provide a little more information like how much you are willing to spend and any specific feature you would like the laptop to have.

Generally speaking any laptop with a Core i3 or Core i5 will be fine for average office use and they will be fast enough for the laptop to last you several years for average office use. The Core i5 is more powerful and will increase the price of the laptop. A DVD drive may or may not be important; if you need to install software / backup data to a DVD / CD, then a DVD drive would be useful. A 1920x1080 resolution screen means you can see more data on the screen at once compared to a 1366x768 screen, but that increases the price of the laptop.

The HP Pavilion 15t is an example of a laptop that can fit your needs. If you purchase it through HP's site you will be able to configure it to your liking. It has a base price of $630.

http://store.hp.com/webapp/wcs/stores/servlet/ConfigureView?storeId=10151&catalogId=10051&langId=-1&catEntryId=889651&quantity=1&color=