I'm looking to get a mac mostly for video and music editing. I plan on running ProTools and Final Cut Pro, among other things. The tower mac (mac pro?) doesn't come with a monitor, and is otherwise just too expensive for me anyway, so I am looking at a 24" iMac. I can upgrade the ram myself for less money, and HD space isn't much of an issue because of external drives I already have, so the 2.8ghz package isn't worth it to me. They have the same video cards, so the only discernable difference is the processor. I can upgrade from the 2.4 to the 2.8; leaving everything else the same, but it costs 250$ to do so. Is the processor worth it? Or will the 2.4 be more than sufficiant?