Just export in the codec your captured in for archival purposes. No point in wasting HD space on uncompressed when you can't get better quality when you have already compressed it when capturing.
Like he said, if it's for documentation purposes, no need to go uncompressed, eats up much more storage with no visible gain in quality.
Only reason to go uncompressed is if you're going to do some high-end color correction and/or effects for filmout... in that case the post facility will get better results working with uncompressed video.