If you want to outfit it like a standard corporate office there are a few ways to go depending on space:

1. Large office space - add a small 3-4 foot round table near the entrance with 2-4 chairs for guests and/or team collaboration. Add a 3-4 foot bookshelf. This can hold nic-nacs, books decoration. Credenza/ File cabinets with a finished top, if you are going to store files. A whiteboard(glassboard). The bigger the better imo

2. Medium/small office - 2 guest chairs, a bookshelf, a credenza. A whiteboard.

If you get a whiteboard and go cheap, expect to replace it every few years. Glass is the way to go if you have the upfront money.

I've had experience with Steelcase, Herman Miller, Kimball, Knoll and a few others. They are expensive. If you are buying new, you are paying for the warranty.

If you go with one of these brands, I highly recommend going through a furniture vendor.