ChessBase Mega Database 2009 contains 62,000 games (out of 4 million+) annotated by experts:
http://www.chessbase.com/shop/product.asp?pid=416&user=&coin=
I don't think it's especially helpful for novices though. (I have it myself, and from memory, the annotations are mostly variations and symbols).
See also here: http://www.endgame.nl/downloads.html
Could somebody please help me out by providing recommendations of good databases of masters' chess games, preferably databases that have many annotated games?