Sorry but the argument that a Mac can run Vista too is stupid. Reason? All that proves is that the Mac is actually just a PC.
Mac is it's OS. Not the hardware. The hardware on a Mac is now PC based, but it's just hardware. The only reason to buy a Mac is the OS. And the OS really doesn't give me any reason to switch.
Vista isn't terribly ugly. Sure, MacOS looks nicer, but damn, if that's the only reason to spend double my money, fuck off.
I can do everything on my PC in Vista, as easily and fast if not in some cases faster, than on your Mac. Fact.
And one other thing ... The only company making major products on the Mac is Apple. Pretty much everyone else sends stuff the Mac's way late (Adobe), or with less features (Msn messenger etc)
So there!