I may add the Wii U to my collection to sit next to the PS4. My 5 year old LOVES Mario and we could play a lot of games together on this.
From what I can tell, the best deal for me may be the Best Buy Wii U Bundle with the 2 Super Mario Brothers U games and Mario and Luigi WiiMotes for $320. Anything else good you've heard of? Mario is where it's at for me, so the Zelda set is tempting but this is more for the kid. :)