Unfortunaltely, I have a strain of the completist bug that few people have. I laugh at people who buy one of each figure (in a "I wish I were them kind of jealous way) because I am a completist to the point wher I collect one of each version to keep in the box, and an extra exclusive (which I usually get on eBay) to open. So yes, I have 2 or three of every Sideshow offering in the Star Wars and LOTR lines. And I am soon to add G.I. Joe to the group.
Hey I pretty much found a pal here. I didn't go to your extend of buying duplicates for everything in the SW line, but I am working on that. Hah hah.
I don't keep any in boxes though, I simply pose the same figure differently.