Quest for Glory 4 is the best point and click version from the Quest for Glory series.  It is also known to be the game in the series with the most bugs.  The voice acting in the CD version is amazing with voice talents such as John Rhys-Davies.  It is also know as the darkest themed game in the series.  This game alone is worth the price that you pay on GOG for the whole series.

Quest for Glory 2 Trial by Fire remake from ADGI is a faithful remake+ game. They consulted with the original game creators, and added game content that was cut out of the original due to disk size constraints. This is almost like playing the directors cut of the game.