[NatureKeeper]

I personally recommend a 3DS (XL). I haven't tried a 3DS XL, but they say the larger screens are better, and it is generally more sturdy than the regular 3DS. Plus the 3DS XL has some good offers with pre-installed titles like Super Mario 3D Land or Mario Kart 7 for free so you are saving the cost of a game (plus technically with the price of these separately for 3DS vanilla, you got a 3DS XL). By the way, screen resolution shouldn't be a factor between systems, really. 3DS (XL) alike have a subpar pixel density.