Hi I want to buy a new mac book pro. I was wondering how much profit I would get out of bumping my processor speed. I do a lot of movie encodig or however you call it. (How much faster would it go with a new processor?) How fast a processor do I need to be able to watch 1080p movies natively on the screen (or what other specs)? And on a 24" external display? I'm wondering because on my current build I am not able to watch a 720p movie without the movie jamming every five seconds.