Which Nancy Drew game is better?

I want to buy a new Nancy Drew game but I don't know which one to download. Message in a Haunted Mansion? Or The Phantom of Venice. Which one is the longest and more fun? I already have Curse of Blackmoor Manor, Ghost Dogs of Moon Lake, The Haunted Carousel, The Haunting of Castle Malloy, Warnings at Waverly Acadamy, & Ransom of the Seven Ships. I just dont know which one to choose next!