I am currently trying to put together a system for both video editing and gaming (don't laugh). Whilst I appreciate the 570 has some advantages for video, the 670 is obviously worth the extra cost for gaming purposes. What I find difficult to "get a handle on" is HOW MUCH better the 570 is with video work. I'm looking to be able to do short training videos, to a reasonable standard, for club/ seminar use, not do a 3D remake of Star Wars, so if it's just a case of the 670 being slightly slower at rendering etc, I can live with that, for the better gaming performance. Some advice would be much appreciate.