I've decided to expand my plans for my home box. I am now going to quad boot.
Windows Vista Ultimate x64
Windows 7 x64
Mac OSX 10.5 x86
Linux Fedora 10 x86
I have the Vista x64 installed now as it will remain my primary and largest partition. I plan to add the rest in the order above. I'll update as I get started on it, which will hopefully be tomorrow after my last class for the semester.