I myself just purchased the Secret and Memorial Address albums to add to my collection. I just need four more albums (that's including Rock 'n' Roll Circus) and I'll have all of them!
I would've pre-ordered RnR Circus, but I got a really good deal on Amazon for Secret and MA so I just couldn't pass it up lol.
EDIT: Awww nvm
...I just recounted and realized I actually need five more lol
...