I was hesitant upgrading from 7 to 8 but after downloading the trial and seeing how "color snapping" worked, I upgraded in a heartbeat. Of course it's too late for the upgrade special mentioned in those threads, but it's still worth it in my opinion.
Download the trial and check it out. You can have both 6 and 8 on your computer at the same time.
Also it's handy to know that you can have both on the computer at the same time as I've about half of a home movie edited and am waiting a while for more footage.