I have used both Windows and Mac extensively and I must say that Mac is better for most tasks, with the exception of gaming and maybe programming.
As for Mac being "outrageously" expensive, that depends on the type of computer you're getting. Say you get a decent laptop for $500. Windows 7 Ultimate is around $220. Added to that is MS Office Professional $500 (that's how much it is at Best Buy anyways). That comes to around $1,220. I realize that most people aren't going to get of all that, but I just chose the best MS offers for the purpose of illustration.
On the other hand, you can get a MacBook Air that, performance wise is quite comparable to a regular laptop, with the exception that it has SSD so it won't store as much as a normal laptop. That will cost you $1000 for the base model. The operating system comes with the computer. iWork, Apple's equivalent to Office, is $80. This will come out to around $1,080. #just
I do have one question though, why does Microsoft create so many versions of the same product? Seriously! There's like 3 versions of Windows 7. Why not just have one standard version?