Should I get a Switch with Mario or N3DSXL with 4 games?

Like if you get a 3DS, you'll have a lot of good older games to play, but you're going to start missing out on the spankin new games coming out that are probably going to be way better than anything 3DS will have going forward. Plus if they ever do make the Switch the exclusive Nintendo console, and drop 3DS, your 3DS resale value goes into the toilet.