I am looking for advice on what adventure to use for a first time DM.  I have played 3E since it came out but I have never been the DM.  Due to the DM leaving town and going back to School I will be filling the roll.  The players have all been through the Sunless Citadel so that one is out.  Can any one recommend anything that is a fun adventure and not to difficult for a first time DM.  I am not to picky about Level as I have not told them to make characters.  There will be three players in the party and possible an NPC if needed.  I would like to set it in the Realms so and advice would be greatly appreciated. 