There's going to be a sale this weekend and it's a "buy one get one 50% off" kind of deal. I was thinking of getting Monster Hunter and Luigi's Mansion, but I'd like to get other opinions too (and also why you suggest the game).
I don't know about Mario Kart, I don't think I'd be playing it a lot. I'm a little skeptical about getting Fire Emblem since it's a turn-based game. I think I'm going to stay away from stuff like Mario Tennis and Mario Kart and look for something with tons of re-playability.