Don't be fooled in to thinking that Office for MAC is just like the Windows version . . . its not !! Does not have as many features, and is generally not as good.
I would stick with Pages. Numbers and Keynote (free on all new MAC's)
If you really have to run Windows applications then install a VM, I use VMware Fusion and run a 8.1 Pro machine from it. Has some good integration features which can run the Win applications in MAC windows.