I'm building an HTPC and will need a license for win 7 home premium or ultimate.

I have the software and will just need a license to activate, what's my best bet?

(I did search but it's hard to not get a million bad hits on this)

$65 if you're a student: http://www.microsoftstore.com/store/msstore/pd/productID.216644200?Icid=Student_HUB_4up_Windows

Win8 dev build?

what's the price / deal with win8 dev build? how stable?

what's the price / deal with win8 dev build? how stable?

Free, no idea how stable.