I just bought 3 licences of Win 7 Ultimate 64-bit OEM for $240 from http://www.arc.com.au
Top buy.
The best thing I like about Win7 is the development process MS went through. They realised that Vista's development process sucked. It took 5 years to make and computers go through a lot of change in 5 years. With Vista, different teams spent ages trying to get their bit to work and longer trying to make a whole build to happen.
With Win7, they went back to how they made Win95, Win98 and XP with having weekly builds. That meant a stable version was made every week. If something was too much of a handfull to get working, rather than bodge it, they dicided if they really needed it. Thats why Win7 is stable as. It even has a live CD version FFS.
I will be upgrading when I get back to Sydney in a day or 2.