Coglestop on 03 February 2008
All things considered, I think it will be Mario Kart Wii.(I think the installed base of Wii's is the key reason)
Granted it's not really right to compare the two games since they are at opposite ends of the racing spectrum.
Of course I'm a little biased... I'll take Mario Kart or Burnout over any sim-y racer any day. I may RENT GT5, though, It definitely a nice game to look at.
