Drowbane said:
If you have the 2e Books, you really don't need the 3e. They offer nothing new.
Absolutely false! If I may assume, I don't think you read the same books as me.
Au contraire, allow me to say I think the 3e Ravenloft line is very good. The best books of the Ravenloft line have been released with 3rd edition.
Want a proof of it? The last book of the line - Van Richten's Guide to the Mists - was released as a free downloadable PDF. Get it here:
http://download.white-wolf.com/download/download.php?file_id=410
The quality of the book is excellent, IMHO. But do not take only my word, read the PDF!
Then, if you like what you see, then let me assure you the rest is as good (minus one or two). Particularly good are:
Van Richten's Arsenal (2002) - new tools to hunt undead and monsters. Very cool tools and spells, close to the flavor of Ravenloft and making Ravenloft different from the other settings.
Gazetteer Volume 1 (2002), Volume 2 (2003), Volume 3 (2003), Volume 4 (2003) and Volume 5 (2004) - a large section devoted to all the Core's domain. You never got that much info in any 2nd edition book, even all of them combined.
VRG to the Walking Dead (2003) and VRG to the Shadow Fey (2004) - one of the writer of these books was involved in VRG to the Mists. New stuff on lower undead and on fey. Never printed or developped in 2nd edition books.
Dungeon Master's Guide (2003) - highly suggested - a lot of flavor ideas for a RL DM.
Legacy of Blood (2004) - new family secrets. Do you want to play a Boritsi? Never seen in 2nd edition.
Dark Tales and Disturbing Legends (2005) - new cool adventure hooks.
Also, don't just take my word again: there are plenty of fan reviews you can read on Ravenloft books here or at the FoS site (follow my sig, reviews area).
Joël