Best way to remove DRM from AZW3 while preserving original formatting?

I just recently started using Calibre to archive my Kindle books, and I wanted to know if there was a "best" way to remove the DRM from the AZW3 books while keeping the book as close as possible to the original formatting. I read elsewhere in this forum that doing AZW3 to AZW3 conversion is not a good idea.

Edit: I guess I should ask if the simple act of importing the books while the DeDRM plugin is installed is enough to strip the DRM from the resulting imported AZW3 files?