About to buy new 2013 iMac, can i use bootcamp?

Hi All

I am about to buy a new iMac.

I need to know which version of windows is the most robust using Bootcamp. I am reading the forums and it seems people are having all sorts of issues.

1. I need native windows as I need to run 3D Studio Max and have access to the Windows version of Steam (Games frontend)

2. Looking at a 32Gb iMac with 3TB Fusion Drive and a 2TB Time Machine.

3. 1TB will be reserved for Windows.

I don't mind either Windows 7 or Windows 8.1, whichever is the most realiable.

Is this possible and fully supported using OSx Mavericks?

Many thanks
Geoff