I just saw that!
I also have a $40 rewards certificate to use making it $235.
I dont think I can beat that price.
Should I go 3DMario World or Super Marios U bundle?
http://www.bestbuy.com/site/wii-u/wii-u-consoles/pcmcat274600050016.c?id=pcmcat274600050016
Here's my opinion on those two games for you to choose from on your bundled set:
SMWiiU feels a lot more like the older mario games. IE: NES, SNES. The difficulty factor is up there too.
3D World is definitely more accessible as a game and follows in the line of the N64 version and onward.
The SMWiiU is more of a sit and play through by yourself type game. Though my kids play it too, we rotate. It especially has the Super Mario World (from SNES) vibe to it.
3D World is a great multi-player/family game. I play this one more with my kids and wife. The more my kids die the easier the game gets as it adds in some "super-mushroom" like items that make you invincible to all things but falling off the ledges. So after my kids die a bunch they start adding these in and my kids can play along well.
So do you want a more difficult game to finish and spend more time playing it by yourself (SMWiiU) or do you want a more simple game to play through and play it a lot with the family/friends (3D World)?