Hi Egamar!
Seems like you've got most of the CII stuff already!
With the BB and the mini expansions you've already got, its just a few big expansions that you're missing i think.
Expansion 3 Princess and the Dragon
Expansion 4 The Tower
Expansion 5 Abbey&Mayor
Expansion 6 Count, King & Consorten
Expansion 10 Under the Big Top
Then there is the new edition of the Festival, with 15's on it instead of the 10's. As far as I know, it has only been released with some versions of the base game, and i think Amazon.com have it available for the US.
And the new expansion the Market of Leipzig will be in new art i believe (can't imagine it not being), so that will be on the list as soon as it comes out