which mac should take for office use

For everyday office work, a MacBook Air is worth considering if you need a portable laptop. If you mostly work at a desk, a Mac mini could be another option. What kind of office tasks do you usually handle?

For everyday office work I would start with the current base MacBook Air unless you need a bigger screen all day. Get 16GB of memory if you can because that is what keeps lots of browser tabs and office apps feeling smooth a few years from now. Storage matters less if most of your files live in the cloud but go for 512GB if you keep large documents or photos locally. Before you buy check whether any work software or company system only runs on Windows because that is the one thing that can make a Mac awkward in an office. If you are mostly at a desk a larger external monitor will probably make more difference day to day than a faster chip.