SladeSS wrote:
So, I can interchange between the Mac OS and Windows at any time I want or did I understand that wrong? Is it a one or the other kind of deal?
Yes, please read the Boot Camp FAQ for additional information. You will need to buy a license of Windows 7 and once your get the iMac run an App called Boot Camp Assistant and follow the on-screen instructions to install Windows. Once you have you completed you will have both OS X and Windows 7 installed. BTW there is a Boot Camp forum if you have more detailed questions, that is where the Boot Camp and Windows guys hang out.
Note: Whenever you load MS Windows on your Mac it then becomes a native Windows machine when running Windows. This means like any Windows box it is susceptible to ALL the other issues Windows users have to put up with including viruses and other malware. The good news is even if your Windows partition becomes totally diseased that in no way affects the OS X partition or OS X.