Skip the old quad cores and get into the i5 or i7 machines. Our video editor hums along on 4GB ram so you wonder if consumers are being oversold on ram. Your choice here.

The new i series with its turboboost will speed up cores when other cores are not working hard. You gotta see this in action.

Try this. Go to newegg.com and click on desktops. A desktop picker comes up on the left so you can put in the nice i7 cpu and see what shows up.
Bob