As a Nintendo fan, I've always thought that the Luigi's Mansion games looked fun and interesting, but I never pulled the trigger on either of them. The closest I ever got was co-op in my girlfriend's copy of Dark Moon, which was a fun time. Now with 3 announced for Switch and a port of 1 coming to 3DS, Nintendo's finally forced my hand.
Dark Moon has an advantage by going for only $20, but I know there's a significant portion of people who think it didn't live up to the original. At the same time, the original's supposed to be a short game, so I'm hesitant about plopping down a full $40 for something I can run through in a day.
So which is the better option?