Quote Originally Posted by cseeman View Post
I would avoid the MacPro. There's really limited benefit given that it's using just speed bumped Xeons from 2010. It might have some benefit if you were doing a lot of compression but not much for typical editing.
GHZ speed is not as much as an issue in video editing as much as the amount of cores, memory & maybe dedicated video card. Usually with video editing normally it will have some kind of compression and rendering before exporting it somewhere like Youtube, Blip.tv ect. Usually the editing format video files are going to be quite large ( Like ProRes ) until you export in a more internet friendly format.

The amount of video isn't an issue, the codec and compositing would be a factor. The current MBPr handles AVCHD natively without issue. I think Apple demo'd 9 simultaneous using multicam.
Its not just the retina MBP but with any Mac that has OS X 10.8 Mountain Lion where they added better support for AVCHD.

Keep in mind you should use and external drive. A Thunderbolt RAID would be blazing fast.
Yes, should not use system drive to hold video files, but on a secondary hard drive.