I have many OS's but the only boxed ones are:

Windows NT 4.0 Workstation - This OS will always have a special place in my heart. God I loved NT back in the day.

OS X Tiger - Self Explanatory

I would love to have all X flavors in boxed sets. I would also atleast like to have all the classic OS's on their original CD's. I have no Mac OS on floppy, bu do have DOS 6.22, Win 3.1 and Win 3.11.