I have a lot of PCs around my house, 3 desktops and mumble, mumble laptops! I'm slowly becoming a big Windows 7 fan after my experience with Vista here, here, and here. The Big Honker is just humming along with Windows 7 Home Premium 64-bit.
On one of the podcasts I listen to Paul Thurrott mentioned Microsoft's TechNet subscription and even pointed to a coupon to lower the cost to less than $300. In a recent podcast, Paul mentioned Microsoft has announced a new TechNet Standard subscription for $200. Rather than me rehashing all the work Paul has done, here's his post on this.
I bought a TechNet Standard subscription and have started using it.