Go for Wii Fit if it's in Stock as you can get MK Wii, but Wii Fit is sure to have a shortage, also MK Wii is more likely to come down in price faster then Wii Fit.
I waited a week and got MK Wii for £32 instead of £40
I vote : Wii Fit.
Playing : PC AOE, DiRT 2, Runes of Magic, Wings of Prey & Planetside 2
Wii U : Nintendoland, Super Mario U & Fifa 2013 demo
DS : Guitar Hero : On Tour
Formerly unknown as Vengi







