Those of you who say PCs only last at most a year or two... read on...
I bought a Dell 12" notebook back in the days... 5 years ago... and as of today, it still works just as well as it did the first day I got it. Granted I take really good care of my electronics... however, that laptop had actually been transferred to two other users who don't necessarily take as good care of it as I did. Still it lives on and thriving. In fact, both users told me that laptop worked a lot faster than they expected being 5 years old. So your statement about PCs lasting only 2 years is totally false.
In fact, I have a 4 year old Toshiba, a 5 year old Motion Computing Tablet PC and they both still work very well. So if you've been a mac user all your life without any REAL experience with a PC, please don't try to put down something you don't even know about.
I actually have an iMac 20" that I've been using alongside my PC in the last 4 months. I read reviews and all that stuff, too. Nothing's wrong with my iMac YET, but I've read reviews where the display is all messed up. In all 15 years of using a PC... I've never had that problem. Of course, I build my own PCs, so of course I don't have problems. But I've built a lot of PCs for myself, family, and friends, so I can say... None of those PCs ever give anyone I know a problem...
To be fair, no one I know has a problem with their Mac either... but their Macs are new to them, so there really is nothing to compare.