The whole measure by clock is all wrong. The clock speed makes no difference, it's how its used. AMD has always focused more on performance than clock speeds. They perform more clock cycles in less time, and the Athlon 64 is 64 bit rather than 32 bit so using 64 bit software (which is rare so far, but slowly coming) will add to the performance. People have been getting confused as to why AMD have such a low clock rating when compared to Intels P4. Well AMD in fact, uses a performance rating (PR
rating) to compare to competing chips, namely Intel. Even though the 3500+ only runs at what? 2.2GHz? It's called a 3500+ because it's theoretically of equal performance of a P4 3.4-3.5GHz processor, hence the 3500+. When using a good mobo and RAM, AMD can actually benchmark a couple levels higher than the PR
rating says, being comparabe to even a P4 @ 3.6GHz.
Have you looked into dual core CPUs such as the Athlon 64 X2? They will do a good job in terms of video editing.