The files are much larger than you probably need, but since ProRes is a high-performance codec you'll probably be fine as long as you don't cut more than 2 to 3 streams. Multi cam editing may prove to be temperamental.
David Roth Weiss
Director/Editor/Colorist & Workflow Consultant
David Weiss Productions
David is a Creative COW contributing editor and a forum host of the Apple Final Cut Pro forum.