If you use MS Office a lot and would like to do it on your tablet, then get the Surface 2. I use Office a lot and Google Docs a lot. The way i divide it is, for personal or team intense documents I use Google Docs, and for business or highly complex documents I use Office.
For sure, MS Office is only practical if you get the keyboard.
An alternative is the Asus T100.
One thing I do love about MS is that they control the updates, which means you get them quicker regardless of the manufacturer.
On my Droid Xyboard I use skydrive.com to edit documents. I am considering the Surface 2 though. Ideally I would like to have both, but realistically I realize that is not smart. I would get a keyboard case with either tablet, or possibly a leather portfolio case.