Since Windows 8 was released, I've been buying laptop PCs for our company through Toshiba Direct and pay a little extra to "downgrade" to Windows 7 Pro. We've had really good results.
I've had to do this at every company I've worked for because most PLC programming software packages lag behind on supporting new Windows builds.
Its actually a nice situation: I always know what to expect. I happily work on XP as people complain about Vista. I'm moving right along on 7 while hearing the pitfalls of 8.
Meanwhile, I haven't had to replace my personal laptop since graduating college, so the ol' girl back home is chugging along with Vista. She's still fighting the good fight, but I've got all my beer recipes and notes on Google Drive, just in case...