DSi and Wii.
DSi because it has loads of great possibilities, and the Browser is excellent.
Wii because it has great graphics, I love the hand-movements, and the Web Browser is good too
The N64 and the Wii.
The N64 because it had the first 3D graphics and it had good games.
The Wii because it has great graphics(even though the Game Cube has the same graphics),Wifi,and motion controls.