This June, I'm planning on getting the 4 core Mac Pro. Problem is, would this be enough for me? I do a lot of video editing in iMovie, but I may use Sony Vegas on a Windows partition. I also watch 720p and 1080p videos frequently. Would this be enough, or should I get a 6 core? And also, you can always upgrade the processor, add a Blu-Ray drive, and add an internal capture card, right?