In a few weeks Intel will be releasing a 6 core LGA-1366 pin i7 CPU called the 980X. It's looking to be a monster for video editing. 3.33GHz, 6 physical cores + 6 logical cores (hyperthreading).
See review here:
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3763
If you already have an LGA-1366 compatible motherboard (i.e. running a 920 now) then this would be a worthy upgrade to extend the life of your current motherboard and memory. It is expensive but if you've gotta have the fastest...
- Mark