There are a gajillion versions of A Christmas Carol lying around, but I have a soft spot for the 1970 musical version with Albert Finney. It's a bit overblown and Finney's not my favorite Scrooge, but this version is beautifully mounted. The sets take up the space of an entire city and they look like a place you could actually visit. The musical numbers make the story seem like even more of a spectacle. Sometimes I'm in the mood for a quiet, contemplative version of A Christmas Carol with a well acted Scrooge, but if I want a version of CC that's colorful, brash and fun like a Christmas morning, I'll watch the Finney version:
Twelve Hundred Ghosts is an interesting experimental version of Christmas Carol that combines 400 versions of the story together, told through different mediums (comics, TV shows, movies, text, etc,) It's not for everyone (and it's not for the kiddies as someone threw in a couple of porn versions of A Christmas Carol,) but it can be fun if you have some time to kill.