I have three computers,my agency software with links to airline reservations systems etc is on a Mac,I use a PC running Windows Vista for PIO and general internet and I have a Macbook that I take with me when I travel,I think I actually prefer the PC for day to day use,I keep it updated and it does the job for me.
I use both and have done for years I love Mac laptops in particular and find them reliable unlike the PC laptops I have had over the years. I use my PC [desktop] for most things especially since upgrading to Windows 7, which works wonderfully.
We also have a unix box here for the really nerdy stuff.
“The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of star stuff.”
― Carl Sagan, Cosmos
Dump the Macs and the Windows PC's , LINUX is for me!