After years of using PCs I'm finally going Mac. I'm trying to decide between the MBP 2.2 or 2.4. I will be doing some video editing using Final Cut Express. Video editing not my livelyhood...I'm a hobbyist. I know the 2.4 will be faster...but how much faster? At my level of editing, how much of a difference will the better processor and graphics card really make?