Well, there you have it! I bet you everything is clear now, isn't it?

Well, to summarize:
I think I was on the money when I said that Macs are better integrated, but more expensive and you're stuck with paying for the service at the Mac store.
As far as reliability: You really have to be a bit more computer literate with a PC. However, With Win 7 and a bit of computer savvy, a PC will be just as reliable as a Mac. Yes, you have to install an anti-virus program, but that only has to be done once. It will update itself automatically.
Keep in mind though that IF you do experience problems, it's SO MUCH EASIER to find someone to help you with a PC than a Mac. With a Mac, you have to go to the service center, wait for a few days for your mac to come back and pay a premium for it.
Interface is subjective. I hate it, personally. It's not intuitive to me at all, but to each his own.
Think about this too: Much easier to find free apps for the PC. You have to pay for every app on the Mac.
And another thing, PC is the only way to go if you want to do something out of the ordinary, as in try to make it do the things it wasn't designed to do. You're locked in with a Mac.
Hope this helps.