I too, find Windows to be a very stable platform to work with. I am using Windows Vista Business 64 bit, and have never had any problems running the computers that I have it loaded on and don't feel any pressure to upgrade to Windows 7.
Everything works. I'm running 8GB ram on a Core 2 quad 2.4 Ghz processor, 30" NEC Multisync monitor, laser printer, Epson 4000 printer, Epson scanner, Wacom usb Tablet, bluetooth mouse and keyboard, 4 or 5 hard drives, LaCie Networkstorage, and Altec Lansing sound system, and I also update my Windows Moblie 5.0 phone to the computer wirelessly. This computer is connected to two Sony laptops, one running Windows Vista Business 32 bit, and one running Window 98. It all works, and all three computers are connected to the internet by cable and wirelessly on occasion. For software, I am running Photoshop CS5, Lightroom, Dreamweaver, Open Office from Sun Microsystems, Illustrator, and TurboCad for Windows among others.
I do not have any subscriptions to anti-virus software packages, as I utilize the free anti-virus protection offered by Microsoft. I gotta say that the anti-virus software really works well. I hated both Norton and McAffee. The Microsoft version works in the background and is fully automated and all but invisible to the casual user. I can truthfully say that I have not had any virus, spy ware, trojan, or worm problems with the service, and I don't worry about them either. As far as those guys in Nigeria trying to get you to help them recover $2 million are concerned -- I thought they died, as I have not heard of them since I installed the MS anti-virus software.
Virus security issues are rapidly becomes a thing of the past for Windows users as long as you utilize the anti-virus and Windows update services on a continuing basis.
As others in this thread have said, buy decent hardware and you will not have any problems running Microsoft Windows.
One thing I have observed in these operating system war threads is, while Windows system users use the proper names for competing software (i.e. Apple, Mac, Unix), some members that utilize those systems feel it is alright to bastardize the Windows trademark (i.e. Windoze, Missta Vista). It would be nice if those members extended civil respect, that Wetpixel has become known for, to operating system discussions also, otherwise it looks like those members are cheapening themselves and their points of view (to be perfectly frank, it does become boorish after a while).
If you want a Mac, buy a Mac. There is no reason to vilify MS Windows to justify your purchase.