I don't think I would ever get windows because of viruses, but it also costs 80 bucks more less that windows and windows is still windows.
There are viruses and other sh*t than can screw up any computer on any OS. Just be careful of what you download, and Windows is fine. It's because people don't read what they're downloading that they get viruses and other crap on their computers.
Well, once Win 7 comes out that will replace my vista 64 partition on my mac pro...but really windows is for games...that's about it, pretty useless OS that I turn on on my days off to blow off some steam and play some games with a mouse and keyboard instead of a controller.
Snow Leopard all the way! Windows 7 MIGHT have some cool new features, but I'm a huge Apple fanboy...and for a good reason. Apple quality just can't be beat. PLUS, Mac OS X is much cheaper to upgrade compared to Windows 7 prices.