Nothing else to say

What do you mean when you say "iphone stuff"? Do you currently have an iPhone? It's been my experience that the iPhone works just as well with PC as it does with Mac.

Yes
Because then your computer will just work, Aaaaaaahh

That would make an iPhone (which is already somewhat costly) into a *very* expensive phone. No I think having (or wanting) an iPhone is not a valid reason (in and of itself) to get a mac. An iPhone will work well with a PC or a mac. It's iTunes that you need to make sure is up to date.

That said, if you're in the market for a new computer, give the mac some consideration. They're very nice. Very nice.

For simple syncing, like backing up your iPhone or loading music and video, it won't make a difference. iTunes is virtually the same program on a PC as a Mac.

But many of the other pre-installed applications that come on a Mac integrate very well with the iPhone as well; not just iTunes. All of Apple's iLife and iWork applications have iPhone sharing features.

It would be tough to argue that the overall iPhone experience is anything but enhanced when it's paired with a Mac.

It doesn't really make a difference. Depending on what type of Windows computer you've got, iTunes will work better or worse. Though, if you are in need of a new computer and are happy to learn a new operating system give mac a chance. They are very good.