Add in the 50 to 100 a year for anti virus software that you don't need on a Mac over the life of the machine and the time you spend reloading the windows osv over and over it really starts to add up.
Having a single hardware and OS platform has a lot of advantage's.
If you had a single hardware platform with Windows it would go a long way towards a better TOC for a Windows machine.
Maybe Microsoft will take a page out of apples book like Google is starting to do with its Android devices.
Being highly integrated is a huge plus in my book. No bloat and much easier on support for hardware drivers etc.
Time is nature's way of making sure that everything doesn't happen at once.
Space is nature's way of making sure that everything doesn't happen to you.